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Show Book iii. 1009 The Corp!" Callofiim in 3. Deer, is much different from that of Man, and confil'teth of Two oblong Bodies, which are parted in their Origens, XXXIX. and are reflected towards the {ides of the Brain, and encompafs the ter- 0f the Corpus Callofum. minations of the Corpora firiata. Thofe oblong {lender Bodies of the (or-‘pm Callofa are parted in the middle with a long Filfiire running all along the inlide of them. Thefe Corpam Calla/21 begin in more acute, and end in more blunt An- C H A P. glcs in the Orriput; But the Corpm Cal/ofum of the Humane, and the Avi'fig difcolirfed the Cortex of the Brain (and the Animal Liqlior and Spirits generated in it) the next in order to be treated of is the Brains of other Animals, as far as I can difcover, have a more plain Sur, face above, being endued with fome fmall Prominence. V Corpus Calla/rim, the more white and compact part, which according to 134% or. Iii/ms, may be eafily divided from the Cortex, in a Brain newly difhaed after death. In the upper Surface of the Brain under the Sagittal Suture, is formed a great Filliire, in which is lodged the great Procefs of the Dun: Mater, made of itsDuplicature, and likea middle Wall it rendreth an equal partition of { theriphtlrom the left fideof the Brain, dividing it into two Hemifphzrts ' which unite themfelves inthe Carlin! Calloflim, and giveth a reception to every 1‘, :2 mo He. iiiiiplpeicsc [ii c l u intl'e I. 0f the Ventric/er (f the (Brain. diliiiiét Particle of the leveral Anfrdfim of the Brain, ferving as it were for 3 Covering and Seeling for the Form'x, the Melly/la oblongnta, and its Various Procelles. Thislarge Medullary Procefs is thick and deep in the fore part of the ‘ Brain, whereitis aflixed with two fmall Pi‘ocelles to the two Apices of the HE Ventricles 'l‘ according to the received Opinion, are Four in number, but in truth are Two, as the molt principal; the Right and Left Ventricle, Two large Perforations in the lower Region of the illm'nl/a Obltmgila‘il, called the Lentiform Procelies, from which it is conceived J i" to take its firlt rife, and extending it felf toward the hinder part ofthe Brain, part Carpm Callofum, bending with an unequal Magnitude, iron] the hinder groweth thinner and thinner, at lall cloling with the Caudex of the Mednlla aliluingdta by the inrerpofition of thin Membranes and Veflels. towards the Origen, and more contracted toward the middle, and is afleéted with a blunt round Figure, which being carried With a Flexure, aftera The Figure of the Corp/L5 Callafltm, according to Learned Vefaliur, is long kind refemble a fegment of a Circle, and are parted from each other in the midlt, with a kind of tranfparent Wall, commonly called the Sepium Lucidum, and in the upper and lower with the Forum, and in their . . extremities, with larger proportions of the Corpus calla/um. L; andnarrow, and hath in the upper part a very finoorh Convex Surface, loinewhat rcfembling the prominence of the top or {ides of the Brain (but the lower Surface cannot be difcovered except the left and richt Ventriclcs be opeiit d, and then the lower Surface hath a flexure all thelength of the CW"! JRi 31m The TWO prime Ventricles are feated in the middle of the Brain, \‘Vltll a L‘izi'i'ofiuu, and is iiotone and fiinple as the upper was, becatife to the length kind of aquidil'cance, in reference to the feveral Regi =ns of it, both back- two Surfaces are drawn, hollowed like the fourth part of a Circle and in the middle of thefe two Surfaccs appeareth a Tribunal/(m, extenddd in the downward, in relation to the Vertex and Bafe of the Brain, and‘do perfect- manner of afir‘aight line, having a Convex Surfice downward, by reafon Size, and Ute. ]l' agree with each other, both in Situation, Figure, . is called the Scytnm littz'n'imz, pin-ting the right and left Ventricles of the Brain: "hich is of the fame fubliance with other parts of it and is {0 thin tious litbllance, commonly lifyled the Cortex, and is made up of a company of Arteries and Veins proceeding from the internal Carotides, and jugulars, upper and principally from the great number of nervous. Filaments. Th; part of the Ventricles pafling the length of the Brain, almoPt from t e Forehead to the Occipur, is linooth and even; but the lower Region of the V1611" tricles is carried obliquely forward tOWaI‘Cl'thC Cavrty of both Ventpc ts, Commonly called the Third Ventricle, being ready to receive the erous Matter tranfmitted to it; the Third Ventricle being-reflected With the Smut, caufeth a protuberance to be made both in the anterior and pofierior parts of the lower lides of thefe Ventricles; and the Right is carried lleeply down from the Right fide to [he Left, toward the common palfige, m'WlllCliy both ventricles are united and the upper Regions ofthe Left and Right Ventriclc are round, and févered by the S ecnlnm luciduw; .but the lower being I conceive COtitinued all along with the Corpm Callofmn, and Fmax (which to be a Procefs of it) do terminate into a common Duct,running ringer the laments running croll-ways through its fubltance, plainly difcerniblc when it IS dilltcted long-ways. As to the tile oi" the [M‘Pllf Cn/loflun, its great Oflice is to refineafld ad- ysttifitlw Sumo" Ammo/m in its Circulation through :it and its mediation i a unit:- to unite the left and rightl'lemifphzere bfthe Brain, and tol'm' pagi the Sunni"; [wit/um, and by its allil'tance the Fornix is kept up from. comprelling the Cavities of the Ventricles. The The rcat oi‘ the V'cntti" Lit-s. . a emeriAgreat part ofthe outfide of thefe Ventricles are covered With Tlieliibftance of the Curpur Calla/Hm is a Compage made up of aninnflinerable company of white medullary oblong Bodies which are lireaky Fi‘ Brain (as ionic "ill have it) but in truth are we ptintipa‘l ones. ward and forward, as to the Occipiit and Forehead; and. alfo upward and or its Prominence, and more and more contracling it felf into a leS compali, and diaphanous in the middle , that if it be held tip in ajbright day the lightiiiay be dili‘rrned through it. In its upper Region it is ioyned according to lenOth to the CorpiuCalMimi, and in its lower to the l'ornix. D in: iiiie m 1.: mum! of the Brain, toward the Forehead, either Ventricle being more eitpan‘ded t T, ,8. 9.0. +1", 11,11. Four Ventriclcs of the armx, The Ventri~ clcs run equal in reference tocach crhm‘ The Ventriv chute l'cic- mi from (35!; other)"; the rpnulum lit" (Ham |