74 



CRUSTACEA MALACOSTRACA. II. 



tioiiing. Ill his specimen the posterior legs have the seventh joint a little shorter and the claw longer 

 (viz. half as long as seventh joint) than in ni>- .specimen. The only important difference between the 

 two specimens is that in the antennnlse the seventh joint is considerably or rather much shorter than the 

 sixth in Vanhoffen's specimen, a little longer than the .sixth in my specimen. But in spite of this 

 difference, I think that both males belong to the same species. In males of Lcpfogiiafliia brcvircmis 

 I have observed a conspicuous variation in the length of seventh antennular joint. The female of 

 L. longirciiiis is allied to L. Ha>isti/i\ but the male of I., loiigirei/iis differs strongly from that of L. 

 Hansdii in the armature of the chelcC and the extreme length of seventh joint with claw on the po- 

 sterior pairs of thoracic legs (vid. Lilljeborg and my figures published in 1910). The male figured b\- 

 Sars as belonging to his L. longirctiiis differs also widely from that of L. Hanscni. Consequently I am 

 induced to think that the specific differences between males of different species of this group a are 

 much larger than between Vanhoffen's specimen and m\- own, and that the differences observed be- 

 tween these two .specimens are due only to variation. 



Occurrence. Taken b\- the "Ingolf" at a single locality. 



West Greenland: Mouth of Ameralik Fjord, near Godthaab, 5 — 70 fm., shells; more than a 

 hundred females and immature males, and one adult male. 



L. Hanscni has besides been taken at several other places in Greenland by various Zoologists. 



West (Treenland : Karajok Fjord, ab. Lat. 70"" 20' N. ; several spec. Dr. E. Vanhoffen. 



— — Kekertak, Lat. 69° 58' N., 35 — 40 fm., clay; i spec. Nordenskjold Exped. 1870. 

 East Greenland: Angmagsalik, ab. Lat. 65';'^^; 2 spec. Mag. Kriiuse. 



— — — 4 — II fm.; 2 spec. Ryder Exped. 



— — Tasiusak, Lat. 65° 37' N., 20 — 30 fm., stones with alga;; i spec. I" Amdrup 



Expedition. 



— — Cape Dalton, Lat. 69" 24.6' N., 9 — 11 fm.; 2 spec. IF' Amdrup Exped. 



— — Denmark Island, Lat. 70° 27' N.; i .spec. Ryder Exjsed. 

 The species is hitherto oiilv known from Greenland. 



45. Leptognathia longiremis Lilljeborg. 

 (PI. VII; figs. 3a-3e.) 



1864. Tanais loiigircniis Lilljeborg, Bidrag till kannedomen oni de inoni Sverige och Norrige 



forek. Crust, af . . . Tanaidernas familj, p. 19 (Female and adult male). 

 1910. Lrptogiuithia longirnnis H. J. Hansen, Vidensk. Medd. Naturh. Foreuiug i Kjobenhavn for 1909, 



p. 229, PI. V, fig.s. 3 a— 3b. 



F'emale. General aspect as L. Hansfni. — Antennnlse (fig. 3a) moderately strong. First joint 

 a little longer than the three other joints combined, somewhat less than three times as long as deep, 

 moderately tapering; second joint slighth' longer than the depth of first joint, considerabh' produced 

 above and somewhat thick; upper margin of third joint less than half as long as that of the second; 

 fourth joint a little shorter than the second. — Antennae as in L. Hanscni. 



Chelipeds (fig. 3a) nearly as in L. Hanscni; carpus a little less than twice as long as deep; 



