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Show 280 PROE. W. B. BENHAM ON THE [Apr. 2, AVitb regard to colour:-Tbe dorsal surface of the body was black, the under surface of the Huke was also black ; the belly dirty yellowish-white, but much discoloured ; but how far the dark colour extended down the sides, and other details, I was unable to ascertain with sufficient accuracy to put on record. The only detailed accounts of the external features of Cogia to which 1 have access are those by Owen (1865) and by Von Haast (1873). Owen describes two specimens from Indian seas under the name of Euphysetes simus ; the male measured 6 ft. 8 inches, and the female 6 feet only. Aron Haast's account of " Evphgseies pottsii " (according to Flower, these names are synonyms of Cogia brevieeps) deals with a specimen thrown up on the N e w Zealand coast which measured 7 ft. 2 inches, its tail 16| inches, the pectoral fin 9 inches by 3| inches. " The colour black, belly greyish white.'"' These specimens, then, are considerably smaller than m y Cogia. I hope to give, in a later contribution, some account of its viscera, but at present will confine m y remarks to the larynx. I. THE LARYNX OE BALJSNOPTEXA ROSTBATA. The only detailed account of this organ in the Borqual that I have been able to consult is that by Drs. Carte and Macalister (1867), w h o in their very careful and interesting memoir on the anatomy of the Borqual give a fairly good description of the external features, and of the muscles, both extrinsic and intrinsic; but the figures illustrating this account are small and poor, and no sufficient details are given as to the shape of the cartilages. In some respects I have to differ from these authors. I have not been able to consult the original memoir of Dubois (1886), and only know the general conclusions to which he arrives from the abstract in the Zool. Jahresbericht, and this publication makes no reference fo any account of the larynx in the abstracts of Delage's memoir (1885). It is likely, therefore, that I am repeating, to some degree, work that has already been carried out; but m y apology lies in the isolation in which scientific men have to work in N e w Zealand. It will be seen that in general, the larynx of Balcenoptera agrees with that of Balcvna, but in several details it differs therefrom. The aclitus laryngis is, in form, an isosceles triangle, with the apex directed anteriorly upwards; the sides are formed by thearyteno-epiglottid folds (A.ep.f), which diverge posteriorly and embrace the arytenoid bodies, while they converge anteriorly and meet at the apex of the epiglottis. (Plate X X V I I I . fig. 22.) The epiglottis is a tongue-shaped or conical body arising from the floor of the pharynx and directed upwards and forwards. The tip of the epiglottis is, as the drawings show, a rounded point, and |