ReAliie J 
XI. Researches upon the Anatomy of the Pinnipedia—Part I. On the Walrus 
(Trichechus rosmarus, Linn.). By James Muris, ID., F.LS., F.GS., &e., late 
Prosector to the Society. 
Read June 23rd, 1870. 
[Puates LI. to LV.] 
ConTENTs. 
I. Preliminary Notice. V. Vascular and Respiratory Systems. 
IL. Notes on Outward Characters. VI. Myology. 
III. Dentition and Cavity of the Mouth. VII. Final Remarks. 
IY. The Viscera and Generative Organs. 
I. Pretimmary Notice. 
IN the ‘Histoire Naturelle’ (1765, tome xiii. p. 358) of the great French master of 
Zoology, Count Buffon, will be found an account of the Morse or Marine Cow, the 
Wallross of the Germans and Dutch of that period. But this historical brochure is 
further enriched (p. 415) by an anatomical description of a foetal animal from the pen 
of the zealous and worthy Daubenton. Sir Everard Home in 1824 communicated a 
paper to the Royal Society (Philos. Trans. p. 233) containing some curious anatomical 
facts and deductions respecting parts of a Walrus brought home by the Arctic voyagers. 
Von Baer, a name to be revered amongst biologists, published, in the ‘ Mémoires de 
Y Académie Impériale des Sciences de Saint-Pétersbourg’ for 1838’, a very elaborate 
and learned monograph on the Walrus, based on a young living animal brought to St. 
Petersburg in the winter of 1829. This treatise (for such it may be designated) 
deals but briefly on the internal structural organization, which, however, he seems to 
have examined pretty thoroughly, intending apparently to reserve his observations for a 
future time. I am not aware that he ever brought forward these, although he mentions 
the myology and venous system as having interested him. The gist of his memoir 
consists of:—chapters on the early and later zoological researches and history of the 
animal, and on figures depicting it ; observations on the living specimen, its manner of 
breathing, feeding, &c.; a comparison of it with other marine mammalia; habits in a 
state of nature; the recent and ancient geographical distribution (illustrated by a chart) ; 
procreation; and, lastly, a word on the systematic position of the Walrus. 
The same author? had already (in 1833) laid before the Academy a paper “ On the 
1 Sciences Naturelles, tome ii. (6th series) p. 97, “‘Anatomische und zoologische Untersuchungen iiber 
das Wallross (Trichechus rosmarus) und Vergleichung dieses Thiers mit andern See-Siugethieren. (Gelesen 
den 6. Nov. 1835.)” 
2 Mém. de l’Acad. St.-Pétersb. 1835, tom. ii. p. 199. “ Ueber die Geflechte, in welche sich einige gréssere 
Schlagadern der Siugethiere friih auflésen.” 
VOL. VII.L—PART VI. June, 1871. 3M 
