OBSERVATIONS UPON THE SPLEEN. 



117 



In the Plaice (Plaiessa oblonga) it is small and oval. See Fig. 10. 



The Garfish has frequently two large spleens situated in contact with the infe- 

 rior surface of the pancreas. 



In both the salt and fresh-water Garfishes, this organ is of large' size, and often 

 varies in its form in individuals belonging to the same species. 



The form of the spleen varies much in the doubtful reptiles. It is elongated and 

 ribbon-like in the Congo Snake (Amplriuma means, Fig. 23), and flatter, broader, 

 shorter, and more oval in the Hellbender (Menopoma Allcganensis) and Proteus of 

 the Lakes (Menobravchus maculatus). In these reptiles the spleen lies upon the left 

 side. The following figures will illustrate these differences: — 



Fig. 24. 



Stomach, spleen, and pancreas of the Hellbender (Menopoma AUcganensis) reduced one-lialf diameter. A. Stomach. 



S. Spleen. P. Pancreas. R. Small intestine. 



The spleen of Batrachians is generally oval or kidney-shaped, and of small size, 

 and occupies a position near the median line of the body. 



Tbe spleen of Ophidians is a small oval body, firmly attached to the superior 

 and anterior surface of the pancreas, from which it is readily distinguished by its 

 color. This is true of this organ in the Hognose Viper (Ileterodon plat ij rhinos), 

 Black Viper (Ileterodon niger), Grass Snake (Tropidouotus oriHnalus), Green Snake, 

 (Leptophis aesticus), Coachwhip Snake (P*ammop1iis flagelliformis), Pine Snake, 

 (Pituoplds melavoleucus), Indigo Snake (Coluber couperi), Chicken Snake (Coluber 

 quadrioittatus), Corn Snake (Coluber guttatus, Fig. 25), Black Snake (Coluber con- 



Fir.. 25. 



Spleen, pancreas, and gall-bladder of Corn Snake (Culuber guttatus), natural size. A. Inferior portion of stomach. 

 K. Small intestine. P. Pancreas. S. Spleen. 0. Gall-bladder. N. Cystic duct. M. Hepatic duct. 



