128 PEOCEEDINGS OF THE ACADEMY OF [1881. 



made known by Morton,' and called by him Hippopotamus 

 Liberiensis. Its osteology was afterwards fully described by 

 Prof. Leidy,^ who showed that this species differed so much from 

 the ordinary one that a distinct name, Chceropsis, was given to 

 it, as indicating that the supposed new species was really a new 

 genus. Prof. Leidy's views have since been thoroughly' corrobo- 

 rated by other anatomists, particularly by Milne Edwards,^ in his 

 recent beautiful monograph on this animal. The only living 

 example of the Choeropsis Liberiensis ever seen outside of Africa 

 was the female specimen only three or four months old that died 

 a few minutes after arriving at the Zoological Gardens in Dublin 

 in 18*74, and that formed the subject of a paper by Mr. Alex, 

 Macalester.^ Since then, within a year, the late lamented Dr. A. 

 H. Garrod ^ communicated to the Zoological Society of London 

 the results of his dissection of the adult male Hippopotamus that 

 had lived twentj^-eight years in their admirably conducted Garden. 

 It will be observed from this resume of the literature of the 

 subject that, with one or two exceptions, the Hippopotami tlmt 

 have been dissected were young animals ; some not more than a 

 few days or weeks, others about a year old, and that with the 

 exception of the Choeropsis examined at Dublin, they were of the 

 ordinary kind, or the Hippopotamus amphibius. 



While the general results of these various observations are con- 

 firmator}' of each other, nevertheless, on account of the ditference 

 in the age and sex of the individuals dissected, it is still important 

 that whenever the opportunity presents itself of examining a full 

 or half-grown Hippopotamus the results of such dissection should 

 be compared with those already made for the sake of confirming, 

 supplementing, or farther illustrating them. It is with this object 

 that I bring before the Academy the results of my examinations 

 of the female Hippopotamus which recently died in the menagerie 

 of Mr. Adam Forepaugh, to whom I am indebted for the oppor- 

 tunity of dissecting it ; and of the male specimen that died in New 



^ Proc. Acad. Nat. Sciences, vol. ii, p. 14 ; Journal, vol. i, 1849, p. 231. 



2 Journal Acad. Nat. Sci, vol. ii, 1852. 



^ Recherches sur les mammiferes. 



* Proc. of Royal Irish Academy, 1874. The anatomy of Choeropsis Libe- 

 riensis. 



"•> Trans, of Zoo. Soc. of London, 1880. On the Brain and other parts of 

 the Hippopotamus. 



