SPLEEN OF MAMMALIA. 561 



but in contact with the pancreas. In some Cetacea the spleen is 

 remarkable for its subdivisions ; the largest in the Porpoise, fig. 

 354, equals a walnut, h ; the others, to the number of four, five, 

 or six, ib. i, i, are of much smaller size : in the Whales (Balce- 

 noptera) the spleen is, usually, single, but smaller relatively. In 

 Sirenia it appears to be always undivided ; presenting an oval 

 form in the Dui^ono;, and measuring 4^ inches in length and 1^ 



o o' ~ o ^ 



inch in breadth. 



In the Elephant the spleen is long and flat ; it measured in a 

 half-grown Indian kind 3 feet 10 inches, its extreme breadth 

 being 8 inches. 



In the Hyrax the spleen is broad, flattened, semilunar, with 

 occasionally a narrow process from its middle, like a handle : its 

 length is 2 inches, its breadth 1 inch. In the Rhinoceros the 

 spleen is elongate, subtrihedral : in my male subject it measured 

 in length 3 feet 6 inches, and 1 foot 4 inches in greatest breadth. 1 

 The spleen is elongate, and flattened in the Horse, broadest at the 

 upper end. In the Wart-hog (Phaco cheer us) the spleen is a long 

 flattened ellipsoid body, 11 inches in length, and 2^ inches across 

 its broadest part, which is at the middle. 2 The spleen has a similar 

 form in the Babyroussa (Sus Babyrussa) : in the common Hog it 

 is elongate and trihedral. The spleen is elongate and flattened in 

 all Ruminants ; the inner edge is sometimes attached to the 

 crura of the diaphragm : it is broader, at one end, in the Cow, 

 Reindeer, and Giraffe, than in other Ruminants. In one Giraffe 

 the spleen was 10 inches long, and 7^ inches broad: in another 

 of the same stature it was 9 inches long, and 5 inches broad : 

 in both of an oval form, and not more than 1 ~ inches at the 

 thickest part. 3 



If a spleen be injected with alcohol and hardened therein pre- 

 vious to section, the intertrabecular spaces are seen to be larger 

 in Ungulata than in Carnivora. In the Horse such spaces are 

 then seen to intercommunicate by circular apertures. 



In a Seal (P/toca vitulina) I found the spleen a flattened body 

 with an irregular notched margin, measured 5^ inches in length. 

 It was attached to the epiploon in such a manner that it could be 

 drawn away for some distance from the stomach, and in the inter- 

 vening membrane were situated a number of small dark glandular 



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bodies from the size of a horse-bean to that of a pea, resembling 

 the omental splenules in the Porpoise : these were not found in a 

 second specimen. 



In a setter-dog the spleen was oblong, 1 inches long by 3 inches 



1 v", p. N. - ccxm". p. 68. 3 xcvn". p. 228. 



VOL. III. O O 



