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Show 638 ON THE ANATOMY. OF THE CHINESE WATER-DEER. [Nov. 14, reticulum-cells are rather shallow. The psalterium has, as I count, nine primary laminae, and is quadruplicate. The length of the intestines in the present specimen (the body of which had a total length of 33 inches, including the three-inch-long tail) was 29 feet 2 inches, 21 feet 7 inches being small intestine, the remainder (7 feet 7 inches) colon and rectum. The relative lengths, therefore, of these parts were not very different from those that obtained in the younger individual already described. The caecum was three inches long. There were 2\ coils in the colic spiral ; and at the junction of the ileum and caecum is a distinct glandular patch, like a largish " Peyer's patch," though not having the complex structure of the ileo-caecal gland met with in Moschus, Cervus, Camelopardalis, &c. The only figure hitherto extant (that given by Prof. Garrod in his paper already quoted) of the brain of Hydropotes having been taken from a very young specimen, it may be worth while to give figures of the superior and lateral aspects of that removed from this adult specimen, which will be useful for comparison with Garrod's earlier one, as well as with those given by that author and Prof. Flower of the brain in Elaphodus, Moschus, and Pudua, and with the series of semidiagrammatic sketches illustrating Dr. Krueg's valuable paper on the cerebral convolutions of the Ungulata generally \ whose nomenclature on the subject I have also adopted. In its cerebral organization Hydropotes approaches the genus Capreolus more nearly than any other Cervine form known to me, the similarity of the two being obvious on comparison of the figures now ex-hibited( seep.637)jwith those of Leuret and Gratiolet2 and of Krueg3 of the Roe. From Elaphodus and Pudua these two forms differ in the entire disappearance (save very slightly anteriorly) of the calloso-marginal (" splenial") sulcus from the superior aspect of the hemispheres, owing to the greater " pronation " of their brain generally. Sir Victor Brooke has been led, from a consideration of other points4, to associate Hydropotes and Capreolus with Alces, as a group per se, with affinities in some points in the direction of the Old-World (Plesiometacarpal), in others in that of the New-World (Idiometacarpal) forms. It appears to me that the additional evidence in this paper, especially that derived from the resemblance of the generative organs, is strongly in favour of this association, so far, at least, as Hydropotes and Capreolus are concerned. The general similarity in fades of Capreolus to Hydropotes has often struck me, and has even, I believe, led others into the error of mistaking one for the other ! That Hydropotes is in no way intimately related to Moschus was already amply demonstrated ; and the latter form also differs, as we now know, in the conformation of its glans penis and in the possession of Cowper's glands. 1 Zeitschr. f. wissenschaftl. Zool. xxxi. pp. 297-344. Cf. also Garrod, Coll. Papers, pp. 512-517. 2 Anat. Syst. Nerveux, Atlas, pl. x. 8 L. c. pl. xxi. * P. Z. S. 1878, p. 889. |