60 CRUSTACEA COPEPODA. II. 
the front margin of the head, two-jointed; the second joint is about as broad as, or distinctly more narrow 
than, the first, and distally very broadly rounded. In several specimens taken respectively on gills or fins 
of various species of Gadus, on Sebastes, Macrurus and Somniosus I found generally 3, sometimes 2, some- 
what setiform spines placed near each other on the upper surface of the distal joint somewhat from its term- 
inal margin (figs. 4 a and 4 e), and these spines are rather large in proportion to the minute spines or prickles 
found on a part of the same joint. In a specimen from gills of G. callarias and possessing a large genital process 
numerous prickles were found (fig. 4 a) on the distal surface of the joint and some also near its inner margin 
towards the base; in a specimen with a small genital process and taken on a fin of G.ogac only a quite low 
number of prickles could be discovered (figs. 4d and 4 e). Consequently I hoped to be able to separate two 
species by the different equipment with prickles on second antennal joint, but the study of specimens from 
other places gave the result that the idea must be abandonned. In specimens taken on G. merlangus, on 
Sebastes, Macrurus (see later on) and Somniosus the second antennal joint had a good number of prickles. 
— The maxillule have been examined in a specimen with the genital process rather large, the distal joint 
of the antennee with numerous prickles, and taken on the gills of G. callarias. Each maxillula (fig. 4 b) is 
bipartite and has on the posterior side a rudimentary palp terminating in two small spines, thus in the main 
agreeing with Scott’s figure. — The shape of first joint of the maxillipeds (fig. 4c) is rather characteristic; 
the second slender joint, which constitutes the longer proximal portion of the “claw”, has always a very 
distinct spine on the lower side somewhat from the base. 
On the branchize of a small Macrurus Fabricit (taken by the “Ingolf’’) I found a small and clumsy 
form (fig. 4 f), which to begin with I believed to be a new species. But a closer investigation of antenne 
and maxillipeds of one of the 3 specimens revealed so full agreement with the same appendages in typical 
specimens from branchie of Gadus, that I was forced to refer the specimens to C. uncinata. Fig. 4 f shows 
the general aspect of one of the specimens; fig. 4 g the front margin with both antennz of the same animal; 
figs. 4h and 41 the distal joint of left antenna respectively from above and from below. Its measurements 
are: cephalothorax 2mm., trunk (without genital process) 1.5 mm., ovisac I.4 mm. 
The male of C. uncinata is on the whole well known. Fig. 4k exhibits the oral cone and left maxil- 
lula, which differs a little from that in the female; fig. 41 represents the left maxilla. 
Occurrence. — Taken by the “Ingolf’’ at three places. 
Holstensborg, Lat. 66°56’ N., on the pectoral and ventral fins of Gadus ogac; 23 females. 
Davis Strait: Stat. 35: Lat. 65°16’ N., Long. 55°05’ W., 362 fathoms, temp. 3°.6; 3 females on the 
gills of a small Macrurus Fabricit. 
North-West Iceland: Isafjord, on the tongue and in the mouth af Gadus virens; 2 females; besides 
on the gills of G. callarias, I specimen. 
At West Greenland this species has been taken several times especially on branchize of Gadus callarias 
and G. ogac; special localities are: Umanak, Ikerasak and Julianehaab. At Holstensborg 5 specimens were 
gathered on Sebastes marinus by the colonial director Brummerstedt. — At East Greenland it was taken 
in Danmarks-Havn, Lat. 76°45’ N., on the branchie of Gadus saida by the zoologist Fritz Johansen, 
At Iceland it is common, It has been taken at North-West Iceland in Onundarfjord on branchie 
