1912. 



NATURAL SCIENCES OF PHILADELPHIA. 



485 



l,.Q 





shore invertebrates, and we could obtain no data regarding its 



habitat; and as it came into 



our hands in a preserved state, 



no color notes are available. 



The body is broadly elliptical 



in outline and measures 12 mm. 



in length by 8 in width. The 



mouth is placed about one-fifth 



the length of the body from the 



anterior margin. The penis is 



directed forward. The tentacles 



are lacking or are exceedingly 



rudimentary, 2 and in the position 



usually occupied by marginal 



tentacles numerous eyes appear 



to be the only well-defined sense 



organs. Other eyes, of somewhat 



larger size, also occur over the 



brain in two narrow, closely 



approximated clusters. To- 

 gether these are no wider than 



the brain, though they are considerably longer. 



The mouth is situated in the anterior fifth of the animal and 



opens into a cylindrical pharynx, whose length is slightly less than 



one-sixth that of the animal. Posteriorly the pharynx leads into 



the main gut chamber, of rather slender outline and with seven or 



eight pairs of lateral intestinal branches. These distinctly anas- 

 tomose from the first. 



The brain is situated half-way be- 

 tween the mouth and the anterior 

 body margin, but the imperfect 

 preservation of the animal renders 

 it impossible to trace even the main 

 nerves. 



The testes are ventral and the 

 ducts from them may possibly 

 form an anastomosing system, 

 though this is far from being 

 proved. The large vasa deferentia, 

 originating opposite a point be- 



Fig. 10. — Ventral view of Euryleptodes 

 pannulus. 



Fig. 11. — Central reproductive ap- 

 paratus of Euryleptodes pannulus. 



2 It is possible that the peculiar shape of the tentacle region may be due to 

 injury and partial regeneration. 



