23 
anno 1876 observavit; Arch. for Math. og Naturvid. II. 1877. p. 268. 
Plate. II. Fig. 41—42. 
This beautiful Pyenogonid is the first of the genus Colossendeis, 
which has been described. As early as 1824 a good description of 
it was published by Sabine, and not until 50 years later it was again 
collected by Mr. Jarzynsky off the coast of Russian Lapland. That 
the animal collected by Sabine and that of Jarzynsky would be the 
same was supposed already by Mr. Jarzynsky himself. And I too 
think there can be no doubt but Prof G. O. Sars is right when he 
considers the two names proposed by these authors as synomyms. 
To my knowledge no figure of this interesting Pyenogonid has 
hitherto been published. The descriptions are also extremely insuf- 
fiient, so I wish to give a natural-size drawing of this species 
and also to describe it at some length. 
During the two cruises of the Willem Barents, five specimens 
of this Pyenogonid were collected. In the following list A is a 
very large female specimen of a dark orange colour; B also a 
female of a somewhat greater size and of a light yellowish co- 
lour; © a male of sligther dimensions and the same colour as B; 
D a young specimen of which I feel uncertain whether it isa male 
or a female. E, finally, the only specimen dredged in 1879, is also 
a female and the greatest of all. 
A B D_ ’E 
"Length of the proboseis (in mm.) 34 38 3l4 25 
Length of the trunk 23 233 21 L7 
Length of the abdomen 8 8 N 5, 
Length of the body 57 614 525 42 62 
Length of the palpus a}5) 55 48 38 
Length of the ovigerous leg 71 12 60 47 
Length of the leg ofthetthirdpair 122 125 107 80 
The form of the body is very characteristie. Between the diffe- 
rent segments of the thorax no distincet limits are to be seen and 
the lateral processes are placed close to one another: those of the 
first pair of legs are directed somewhat to the front, those of the 
