130 
bristles are placed dorsally on each abdominal segment. The telson 
has the same number of spines and about the same form as 
Williamson’s fig. of Hyas araneus (1. c. fig. 70), but the hook 
in the hind-edge is narrower, being rounded acute-angled. 
Compared with the lst zoea of Cancer pagurus the larva de- 
scribed above differs, besides in regard to the abdominal segments, 
also in some small details in the appendages. Greater is the agree- 
ment with lst zoea of Hyas araneus (Willi anis o n 1. c., PI. 5 
fig. 73), especially in regard to the abdomen; but the greatest 
agreement seems to me to be with the larva of Cancer irroratus. 
If the larvæ from the “Tjalfe” really belong to Cancer irroratus , 
they have a very great interest; for the adult Cancer irroratus is 
never found at Greenland, but lives at the east coast of N. America. 
Of the mentioned crabs only Hyas araneus lives at Greenland. 
Larva of Munida Bamffica Penn. 
Munida rugosa G. O. Sars, Bidrag til Decapodernes Forvandling II, Ar- 
chiv f. Mathematik og Naturvidenskab, Christiania 1889, 
p. 178, PI. 6. 
(St. 292) 58°24'N, 30° 35' W, 500 m. wire, 3—10—1908, 1 spec. 
The larva belongs to the stage drawn by Sars (1. c.) fig. 12. 
Larvæ of Munida (tenuimana G. O. Sars?) (figs. 34—36). 
(St. 281) 57° 51' N, 43° 57' W, 500 m. wire, 29—9—1908, 3 spec. 
(St. 285) 57° 51' N, 43° 48' W, 1000 m. wire, 29—9—1908, 2 spec. 
(St. 278) 58° 16' N, 47° 12' W, 80—200 m. wire, 28—9—1908, 3 spec. 
(St. 292) 58° 24' N, 30° 35' W, 500 m. wire, 3—10—1908, 1 spec. 
At the stations above the “Tjalfe” has taken some larvæ be- 
longing to a species of Munida. Some of the specimens belong 
to a stage between the stages figured by Sars (Munida rugosa 1. 
c. 1889), some of them to a stage corresponding to the older of 
Sars’s larvæ; the younger larvæ have no traces of pleopoda and 
are 11 mm. long (incl. rostrum), the older 14 mm. As my figures 
will show, there is in most regards a very good agreement with 
