104 
number, two abdominal and two inguinal. There was no trace of ex- 
ternal ears. The eye is defended by a circular external eyelid, and 
by a broad thin membrana nictitans ; there is a small Harderian, or 
inner lacrymal gland, but no true lacrymal gland, punetum lacry- 
male, nor ductus ad nasum. The subcutaneous cellular tissue was 
very coarse, tough and elastic, almost granular to the touch, and re- 
sembling a corpus cavernosum. The disposition of the peritoneum 
and of the viscera of the abdomen was minutely described, and it was 
remarked that the odour of the visceral cavities and parts in this 
Walrus resembled more that of ordinary land quadrupeds than the 
peculiar odour noticed in the dissection of Seals ; but the flesh of the 
Walrus was dark coloured, as in the Seal tribe: the young animal 
dissected, had been fed, since its captivity, on oatmeal, milk, and 
water. The stomach had the form of an elongated siphon closely 
bent upon itself. The liver was divided into seven lobes. There 
was a large gall-bladder. The intestines in this young animal, which 
did not exceed four feet in length, were seventy-five feet long, the 
great intestine being only one foot in length, and the cecum colt 
one inch and a half. The kidneys were very complex, each being 
made up of about 400 small kidneys or renules, and each of these 
showing the normal structure of a simple kidney, such as is found in 
the dog or lion, viz. with the cortical and medullary part, the pelvis, 
mammilla and ureter. In the description of the viscera of the chest, 
the large thymus gland was noticed, and the notched or serrated cha- 
racter of the anterior margin of the lungs. The foramen ovale and 
ductus arteriosus were both obliterated. 
The following is the description of the heart of the Walrus :— 
The blood is returned into the right auricle by a large precaval and 
postcaval vein, and by the coronary vein, which terminates close to 
the latter: there is a small semilunar valve at the coronary orifice, 
but no eustachian valve. A broad crescentic fold, looking down- 
wards, divides the sinus or fossa receiving the precaval vein, from 
the larger and deeper one receiving the postcaval vein: this fold 
answers to the upper border of the ‘ fossa ovalis’ in the human heart ; 
there is no orifice in the ‘fossa’ communicating with the left auricle. 
The appendix of the auricle extends in front of the base of the aorta 
as far as the pulmonary artery ; it gradually contracts to an obtuse 
point: in the Cystophora proboscidea the auricular appendix is short, 
broad and bifid; in both it is occupied by a reticular arrangement of 
carneee columne. The ventricles are broader in proportion to their 
length, and the apex is not produced, as in the Cystophora probosci- 
dea: the carneze columnee of the anterior division of the tricuspid 
valve, and a few of those of the right or external division, are attached 
to a short and thick fleshy column from the free wall of the ventricle; 
this column is connected by a short and thick ‘trabecula’ with the 
septum: most of the other tendinous chords are attached to the sep- 
tum; and a few to trabeculee connecting that fixed wall with the free 
wall of the ventricle. The pulmonary artery presents no peculiarity ; 
it is connected by the ligamentous remnant of the ‘ductus arteriosus,’ 
which is 10 lines long and 5 lines in diameter, to the under part of 
the aortic arch, just beyond the origin of the left subclavian; its 
