1882.] 



ANATOMY OF ERETHIZON DORSATUS. 



273 



the hinder and larger part being crescentic and placed just behind, 

 beneath, and within the angle of the mandible. The duct runs for- 

 wards from the more anterior part of the gland. 



There is a considerable zygomatic gland placed beside the upper 

 molars, its duct opening in the vicinity of the last upper molar. 



The (esophagus is rather narrow above (l''*0 in diameter), and 

 extends for 2"'3 beyond the diaphragm. 



Fig. 2. 



The stomach of Ereihizon dormius partially cut open, showing 

 the two internal folds. 



(B, oesophagus ; h.d, bile-duct ; f.d, pancreatic duct; jp.v, pyloric valve; 



sp, spleen. 



The stomach is an elongated pyriform viscus, bent very sharply 

 on itself towards its pyloric end. Its walls are very thin ; and there 

 are no longitudinal internal folds nor any marked transverse folds, 

 except two. One of these is situated about an inch from the 

 pyloric valve, on the convex side of the pyloric flexure {i. e. on 

 the stomach's greater curvature) ; the other, less marked, ou the 



Proc. Zool. Soc— 1882, No. XVIII. 1 8 



