598 RITTER. 



Dorsal Lamina : Represented by very slender languets closely 

 placed on a rather broad basal membrane (Fig. 24). 



Intestine : Forming a wide loop. 



Gonads : Two large branched organs, lying one on each side 

 of the body. 



There is only one specimen of this species in the collection 

 and for this reason it has not been thoroughly dissected. Its 

 external appearance, however, is very striking and should make 

 it easily recognizable. The siphons are veiy long and flexible, 

 and the smooth translucent test which covers them differs strik- 

 ingly from the dark, crumpled and coriaceous test of the rest of 

 the body. 



The nearest allies of this species appear to be C. squannilosa, 

 Alder, North-western Europe, and C. dura Heller, Atlantic, 

 Mediterranean, and Pacific (Herdman), but the remarkable 

 character of the siphons distinguishes it definitely from either of 

 them. 



Cynthia ere eta n. sp. 



(PI. XVIII., Fig. 5.) 



General Appearance : Body barrel -shaped, of nearly the 

 same diameter throughout; length, exclusive of siphons, 3.6 

 cm., greatest diameter, 2.9 cm.; siphons placed at the dorsal 

 and ventral edges of the body, 8 mm. apart ; branchial 1.4 cm. 

 long, bent somewhat toward the ventral side ; atrial 9 cm. long 

 pointing anteriorly ; color, in specimen presei-ved in formalin, 

 light-gray, tinged with yellow at the posterior end ; siphons 

 dark-brown. 



Test : Smooth in the anterior part, divided into irregular 

 areas by slight folds toward the posterior end, especially on the 

 left side ; prolonged into short processes at the posterior end 

 where the body is attached ; also a few on the right side ; test 

 not thick, but tough ; that of the siphons with deep transverse 

 wrinkles as though much contracted. 



Internal Structure, as far as known, agreeing perfectly 

 with that of Cynthia niac7'osip]iomis, from which, however, it is 

 very distinct in external characters. 



