392 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL, XXXIV. 
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 
Jan which is much shorter than any of those follow- 
YA iar ing. The lateral parts are tumid, but not greatly 
swollen, and do not project anteriorly beyond the 
aa limits of the thorax, nor posteriorly quite to the 
CS) extremity of the abdomen. ; 
The abdomen is entirely unsegmented, without 
any traces of segmentation and is devoid of ap- 
hes ena ais pendages. It is large and triangularly produced 
woyanciiz. Aputr posteriorly with the apex obtuse. (See fig. 1.) 
cece ae aos 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. 
Fig. 2.—COLOPHRYXUS 
Only one female and one male were collected by — yovaneuim. Apvwt 
the U.S. Bureau of Fisheries steamer Aldbatross off  F=MAuE VENTRAL 
the South coast of Long Island at Station 2235 at a Mere 
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 
Fic.3.-Cotopnryxus Aspidophryxus Sars,* Prodajus Bonnier, and Ar- 
Ae Mare throphryxus Richardson? than to the other genera 
Z of Dajide. The absence of pleopoda brings it 
closer to Arthrophryaus. The female, however, differs from the 
female of Arthrophryxus in the unsegmented abdomen. 
4 Crust. of Norway, IT, 1899, pp. 227-228. 
6 Proc. U. S. Nat. Mus., XX XIII, 1908, pp. 695-696. 
