b BIOLOGICAL SURVEY OF 



COPEPODA NOTODELPHYOIDA 

 ENTEEOCOLIDAE 



Cryptopodus amarouci spec. nov. (iig. 1) 



Female: The general form of the body is in no way re- 

 markable. The cephalothorax and genital segments are 

 coalesced and show no indication of segmentation other than 

 three grooves surrounding the body and located between the 

 first and second, second and third, and third and fourth pairs 

 of legs, respectively. The posterior end of this part of the 

 body bears a pair of conspicuous, dorsolateral, conical 

 papillae. The abdomen consists of two quadrate segments, 

 the anterior one being much the larger. The furca has each 

 branch in the form of a cone directed outward and ventrally 

 and ending in a conical claw. It bears, in addition, two setae 

 near the middle of the outer margin, two on the outer margin 

 near the base of the claw, and a dorsal seta near the base of 

 the claw. 



The other appendages show little of interest. The outer 

 ramus of the fourth leg bears two terminal claws, and a 

 seta and papilla near the middle of the outer margin. 



Male : Unknown. 



Length : 2.0 mm. 



Color: Pinkish-white, the body rather opaque. The eggs 

 are borne in two long strings and are pale violet. 



Hosts: Type from Amaroiicium (? A. glahnim), para- 

 types from T etradidemnum alhidum. I am indebted to 

 Dr. Henry C. Tracy for naming the hosts. Both are com- 

 pound ascidians. 



Type : B 166 ; paratypes, B 149. 



