20 CRUSTACEA MALACOSTRACA. III. 



6. Ianira Vilhelminae Stephensen. 

 1913. Jauira Vilhelmina K. Stephensen, Meddelelser ora Gronland, Vol. 51, p. 68; Pis. I — II. 



This large and robust species is very characteristic. Stephensen's figure of the entire animal 

 renders the species easily recognisable, but as he did not publish any real description, the more im- 

 portant specific characters may be pointed out here. 



Description. Surface of the body without granulations or hairs. — The head has the rostral 

 process long, while the sides are somewhat expanded and at each side produced in a broad, moderately 

 long, triangular plate directed forwards and a little outwards, nearly as long as broad and with the 

 end obtuse or subacute; the frontal margin between this plate and the rostrum convex. Eyes small 

 and very distant from the lateral margins. 



The lateral part of the thoracic segments rather expanded and produced into lamellar lappets; 

 second to fourth segments with two lappets at each side, and the four remaining segments with a 

 single lappet; all lappets are subtriangular, with the end obtuse, and most of them nearly as long as 

 broad, but those on the two posterior segments are a little longer than broad, distinctly longer than 

 the preceding lappets and directed considerably backwards. Epimeral processes are completely wanting 

 at the four anterior segments, while at the three posterior segments they are seen from above as small, 

 obtuse or acute protuberances situated behind the base of each lappet. 



The postero-lateral parts of the abdomen produced at each side of the uropods into a large 

 triangular plate about as long as broad. 



Remarks. The marsupium of one of the females is occupied by a species of Sphcrronclla. 



Occurrence. Not taken by the "Iugolf". Hitherto known only from Northern Stromfjord, 

 West Greenland at Lat. 67°45' N., where Dr. V. Nordmann collected a good number of specimens ; the 

 depth was 213 — 218 fath., temp. -4- 07 . 



7. Ianira laciniata G. O. Sars. 

 (PI. I, fig. 5 a). 



T872. Jauira laciniata G. O. Sars, Forh. Vid. Selsk. Christiania for 1872, p. 92. 

 ! 1897. Ianthe laciniata G. O. Sars, Account, II, p. 101 ; PI. 41. 



The figures and description published by Sars convey an excellent idea of this characteristic 

 species, but a correction and an additional observation may be noted. Sars wrote: "Segments of meso- 

 soine with the lateral parts laminarly expanded, and each produced into two lanceolate lappets separ- 

 ated by a deep incision, those of the 4 anterior segments subequal, those of the 3 posterior ones rather 

 unequal, the anterior lappet being much the larger". At a first view this seems to be correct, but 011 

 a closer examination it is seen that each lateral lamina has two lanceolate lappets only on second to 

 fourth segments, while each of the four other segments have only a single lappet, because the 

 apparently anterior lappet of first segment and the apparently posterior and somewhat small lappet of 

 each of the three posterior segments are in reality marked off by a suture, being epimeral processes 



