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MR F. G. PARSONS. 



have examined many species of deer and antelopes, and only 

 occasionally have I found even a single notch; neither are 

 notches found as a rule in the ox, sheep, goat and horse. The 



Fig. 5.— Spleen of Seal, showing many notches. 



museum of the College of Surgeons, however, has specimens of 

 spleens of the Indian and African elephants, the hippopotamus 

 and the peccary, which are distinctly notched. 



Fig. 6 shows the spleen of the axis deer (Cervus axis), which 

 I believe is fairly typical of that of the Ungulata as an order. 



Fig. 6. — Spleen of Axis Deer. 



The Eodentia are another order in which unnotched spleens 

 are usually found, and the borders of the Manatee's spleen are 

 quite smooth. In the Marsupialia and Monotremata the 

 curious Y-shaped appearance of the spleen is well known, but 

 apart from this there are no notches. 



In birds and reptiles the organ has usually smooth borders, 



