172 CRUSTACEA MALACOSTRACA. III. 



Rev. S0rensen captured it at Egedesrainde, and at Julianehaab, Lat. 6o43' N. Mr. Soren Nielsen secured 

 two specimens at Angmagsalik, Lat. 653o' N., in East Greenland. It was recorded from the north- 

 western and the southern coast of Iceland (Sch. & Mein.). The "Thor" has taken it west of Iceland 

 in LaL 64i3' N., Long. z-j^o' W., long-lines, 440 fath., and south-west of the Fseroes, Lat. 6ii5' N., 

 Long. 935' W., 463 515 fath. 



Distribution. At Norway a single specimen has been procured in Finmark (G. O. Sars). A 

 specimen was dredged off the west coast of Ireland, 388 fath. (Tattersall). 



The localities enumerated show that ^E. arctica is not uncommon at West Greenland and off 

 West and South-West Iceland, that it has been taken in trawl or dredge eight times in depths from 

 310 to 799 fath., but that all these places belong to the warm area. 



117. Jga ventrosa M. Sars. 



1859. sga ventrosa M. Sars, Forh. Vid. Selsk. Christiania for 1858, p. 156. 

 ! 1879. Schiodte & Meinert, op. cit., p. 375; PI. IX, figs. 710. 



! 1897. G. O. Sars, Account, II, p. 64; PI. 26, fig. 3. 



1913. K. Stephensen, Conspectus, p. 234 (containing full synonymy). 



As to the structure a few remarks may be made. - The frontal plate is compressed and con- 

 stitutes a somewhat high, transverse keel; in most specimens its lower sharp margin is straight, but 

 in the ovigerous female from the "Ingolf" Stat 81 and in a female from Hardanger Fjord (Norway) 

 the lower margin is considerably concave. - The last abdominal segment has the end a little or 

 slightly produced, acute or subacute, and the terminal part of the rami of the uropods is triangular 

 with the end acute or subacute. But in a not adult specimen from the "Ingolf Stat. 95 the end of 

 abdomen is completely rounded, and the end of each ramus of the uropods is also rounded, but the 

 right outer ramus is considerably more broadly rounded than the left, and as the animal in other 

 features agrees with normal specimens taken at the same station, I must consider the specimen as 

 a variety. 



The complicated and curious synonymy pointed out by me (in 1887) and corroborated by Sars 

 (1897) has been put together by Stephensen, 1. c. The length recorded of the female without mar- 

 supium is 27 mm., of the ovigerous female 22 mm., but the "Ingolf captured a female with marsupium 

 measuring 33 mm. in length, and a female without marsupium 32 mm. long. 



It may be noted that the specimen from the "Ingolf Stat. 85 is only 14-5 mm., shows the 

 features of moulting, and therefore agrees with sEgiochus Nordenskioldii Bovallius. 



It is interesting that the great majority of the specimens of this species hitherto collected have 

 been taken in dredge or trawl. Sars had taken all his specimens at various places in the dredge, but 

 supposes, that "it at times infests fishes of one kind or another"; Schiodte & Meinert, Norman and 

 Tattersall have no records of its occurrence on fishes. But in 1902 Cand. mag. Ad. Jensen (in "Michael 

 Sars") found near the Fseroes a specimen on Gadus morrhua, a second specimen on Brosmius brosme, 

 a third on Molva byrkelange, and several specimens on Hippoglossus vulgaris. 



Occurrence. ^. ventrosa has been captured by the "Ingolf at several stations. 



