34 CRUSTACEA COPEPODA. II. 
The numerous figures of the females of D. ferox Kr. and D. producta Mill. given by Steenstrup & 
Liitken and by Wilson have made these animals on the whole well known. Though D. ferox is rather common 
in the “Ingolf”’ area and D. producta not rare in the North Atlantic the males have hitherto been undiscovered. 
In our Zoological Museum I found a male determined (probably by Ljiitken) as D. ferox and sent down from 
Greenland in 1864; besides the “Thor” captured a specimen off Iceland in 1903, and this is the type for my 
figures. 
The type is 18 mm. long in the median line; the other specimen is Ig mm. The carapace (fig. 5 a) is 
nearly circular in outline, only a little broader than long when measured to the end of the posterior corners; 
each postero-lateral produced part is nearly triangular and reaches, not including its marginal lamella, to 
the posterior margin of the second free segment. The third free thoracic segment is a little longer than the 
second; it is expanded on the sides, with the lateral margins strongly but somewhat irregularly convex, and 
it has, in contradistinction to the male of D. latifolia Stp. & Ltk., no trace of any plate-shaped expansion 
above the anterior angles of the following segment. This, the genital segment, is somewhat longer than broad, 
with the lateral margins a little and regularly convex; the surface has two long, longitudinal impressions. Behind 
the genital segment two segments are found; the first small with the lateral margins convex or even angular; 
the terminal segment is much larger, distinctly broader than long, with the posterior margin very convex. 
— Each caudal ramus nearly longer than the two posterior segments combined, nearly twice, or more than 
twice, as long as broad, with 3 pubescent setze on the posterior margin, and a shorter seta on the outer margin 
somewhat before the end. 
The appendages, excepting antennee and fourth legs, nearly as in the female. The terminal hook of 
the antennee (fig. 5 c) has its distal third somewhat feebly curved, as in the female, while it is much more 
curved in the female D. producta; the hook differs from that of the female in having a moderately long, very 
robust and much recurved secondary claw atthe end of its first third. — The maxillule (fig. 5 d) as in the 
female; they differ from those in the female D. producta in the shape of first joint and in the relative length 
of the two other joints; first joint has a short, somewhat thick exopod terminating in two slender and short 
rami, and each of them with a minute terminal spine. — The maxillee (fig. 5 e) as in the female; fig. 5 f shows 
the armature of the curious lateral, thin-skinned process, and besides how the long, terminal, soft part is 
equipped with numerous minute, sharp prickles, most of them arranged in lines. — The maxillipeds (fig. 5 g) 
have the distal inner part of the very thick first joint adorned with knots as in the female, but partly less 
produced ; second joint about as long as thick, while the real claw is long as in the female, considerably longer 
than in the female of D. producta. — ‘The three anterior pairs of natatory legs as in the female. Fourth legs, 
which in the female have both rami lamellar, unjointed and without sete or spines, are in the male somewhat 
small, with both rami biarticulated and equipped with spines and pubescent setae, as also — according to 
Wilson — is the case in the male of D. latifolia. 
Occurrence. — Not taken by the “Ingolf’’. 
It has been gathered several times at northern West Greenland, viz. at Umanak (Lat. 70°42’ N.), 
Ikerasak (ab. Lat. 70°30’ N.), Ritenbenk (Lat. 69°44’ N.), Jakobshavn (Lat. 69°13’ N.) and Egedesminde 
(Lat. 68°42’ N.); Miers recorded it from Hare Isl. (ab. Lat. 70°25’N.) and Umanak. Furthermore it has 
