392 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXIV. 



Fig 



1. — COLOPHRYXUS 

 NOVANGLIiE. ADULT 



female. Dorsal 

 view. X 7i. 



The cephalic part is large and projects far in front, being pro- 

 duced anteriorly in a wide marginal border. 



The middle portion of the thoracic region is 

 segmented into five distinct segments, the first of 

 which is much shorter than any of those follow- 

 ing. The lateral parts are tumid, but not greatly 

 swollen, and do not project anteriorly beyond the 

 limits of the thorax, nor posteriorly quite to the 

 extremity of the abdomen. 



The abdomen is entirely unsegmented, without 

 any traces of segmentation and is devoid of ap- 

 pendages. It is large and triangularly produced 

 posteriorly with the apex obtuse. (See fig. 1.) 



On the ventral side the oral area is small, rounded, 

 and contracted behind. The five pairs of legs are 

 small, and closely crowded together. They are 

 bounded laterally by the four pairs of coxal 

 plates. (See fig. 2.) 



Description of male. — The male has the head 

 and first thoracic segment fused. The following 

 six segments are subequal. The abdomen is indis- 

 tinctly segmented into five or six segments. There 

 are apparently no pleopoda or uropoda. (See fig. 3.) 



Owing to the scarcity of material, a more detailed 

 description can not be given. 



Only one female and one male were collected by 

 the U. S. Bureau of Fisheries steamer Albatross off 

 the South coast of Long Island at Station 2235 at a 



depth of 707 fathoms. They were found in the 

 trawl wings. The host is unknown. 



The type is in the U. S. National Museum and is 

 Cat. No. 38958. 



In the indistinct segmentation of the abdomen 

 of the male this genus is more closely related to 

 Aspidophryxus Sars, a Prodajus Bonnier, and Ar- 

 throphryxus Richardson h than to the other genera 

 of Dajidse. The absence of pleopoda brings it 

 closer to Arthrophryxus. The female, however, differs from the 

 female of Arthrophryxus in the unsegmented abdomen. 



Fig. 2.— COLOPHRYXUS 



novanglIjE. Adult 

 female. Ventral 

 view. X 1\. 



Fig. 3.— Colophryxus 



NOVANGLIiE. MALE 



X271. 



° Crust, of Norway, JJ, J.899, pp. 227-228. 



»Proc. U. S. Nat. XXXIII, 1908, pp. 695-696. 



