11 
Yet I don’t believe Heller is right, when he says so; for on his 
figure small — but very distinet — auxiliary claws are to be ob- 
served. His figures are on the other hand so very much resembling 
my specimens, that I think it safest to consider this assertion as a 
“Japsus plumae.” 
No considerable differences are to be seen in the structure of 
the ovigerous legs of the two sexes. Hitherto none of my prede- 
cessors has distinguished the sexes rightly. The females show 
small genital pores at the second joint of every leg (Fig. 16), those 
of the males are still much smaller (Fig. 15) and do not occur at the 
second joint of the first pair of legs. The egg-masses are very large; 
when there is only one at the ovigerous legs of the male the mass 
surrounds the fifth joint; when there are two at the leg the first 
is placed round the fourth, the second round the fifth joint, with 
an interval between them. In Fig. 11 of Plate I. I figured the 
ovigerous leg of a female, in Fig. 12 that of a male with an 
egg-mass round the fifth joint. Perhaps the ovigerous leg of a male 
is not so slender as that of a female, and as a rule a slight diffe- 
rence is also to be remarked in the number of denticulated spines 
of the four last joints. So I observed 24 on the 8th joint of the 
ovigerous leg of a female Fig. 13) and only 21 on the same joint 
of a male specimen. The claw at the end of the ovigerous leg is 
pectinate; that of the male (Fig. 14) does not show teeth so nume- 
rous as that of the female. 
For the rest I think the descriptions of Kröyer, Heller and Wil- 
son quite suflicient; in Fig. 10 I figured the end of the claws of 
the mandibles, showing the movable claw with many more and 
smaller spines than the immovable. 
The dimensions of my specimens are larger than those given 
by Wilson. His largest specimen is 15 millimeters, whereas I 
measured specimens of 17 m.m.: this agrees very well with the 
length as stated by Heller: Longitudo 18-Mm. The extent (after 
Wilson is 140 Mm., with the Barents-specimens it is 160 Mm. 
This species seems to be abundant in the places where it oc- 
curs: of one Station there are 20, of another 10 specimens, 
