564 PEOF. w. A. heedman's eevised 



r Siphons concealed by a fold of anterior end of test. 

 2 E. bilabiata, Sluit. (Mai.) 



[siphons not concealed by a fold 3 



TBoth siphons very long, as long as diameter of body. 

 3J E.pihdaris,Yerr. (B.N.Am.) 

 [ Siphons not very long 4 



f Gronad confined to intestinal loop, 60 tentacles. 

 4 j E. adriatica, v. Dr. (Med.) 

 I Gonad not confined to intestinal loop 5 



p, r Gonads paired * E. symetrica, y.Jiv. (Arct. & Med.) 



[ Gonad single, crossing over intestinal loop 6 



(With a circular area on side free from sand. 

 E. glutinans, M.o\\.{A.i\.){=E.arenosa, 

 Body entirely covered with sand. Aid. & Hanc). 



E. glohosa, Hanc. (N.W. Eur.) 



BosTEiCHOBEANCHtrs, Traustedt, 1882. 



Body free, sometimes sandy. 

 Test moderately thick and tougli, wrinkled. 

 Brancliial sac with no folds. Infundibula of small size, cork- 

 screw-like, and placed many in a mesh. 

 Gonad present on the left side only. 



This genus contains a single species, Bostricholranehus man- 

 haitensis, Dekay, from the east coast of North America. 



AscoPEEA, Serdman, 1880. 



Body more or less pyriform, pedunculated, attached. 



Test thin, between membranous and leathery in texture, having 

 no adhering sand and no hair-like processes. 



Brancliial sac with seven folds on each side. Stigmata straight 

 or curved, but not arranged in spirals. No infundibula. 



Tentacles compound. 



Alimentary canal on left side, running antero-posteriorly. 



Gonads developed on both sides. The gland on the left side 

 lies ventral to the rectum. 



There are two species, separated thus : — 



* This species seems to belong to Faramolgula rather than to Eugyra ? 



