'4 



CRUSTACEA MALACOSTRACA. IV. 



Skager Rak it lias been found in depths from 70 and down to 350 fath. (Meinert; H. J. Hansen). At Norway 

 it is common along the whole coast from Christiania Fjord to Yadso in 30 — 100 fath. (G. O. Sars). It has been 

 recorded from two places at West Spitzbergeu, the most northern of the stations at Lat. j&°2j' N., in in and 

 93 fath. (Ohlin) ; from the Murman Sea, 48 fath. (Stappers) ; from Matotschkin Strait, 10 — 15 and 30 — 50 

 fath. (Stuxberg) ; from the Kara Sea, 51 fath. (H. J. Hansen), and somewhat further eastwards at two places 

 in 17 and 22 fath., the most eastern locality being at Lat. 75°oo' N., Long. 75°2o' E. (Stuxberg). At Scotland 

 it has been secured in some places on the western side; on the eastern side in Firth of Forth, 40 to 43 fath., 

 and more southwards off Alnmouth and Sunderland, 59 and 45 fath. (various authors) ; furthermore at Lat. 

 57°54' N., Long. j'jS' W., 212 fath. (by the "Thor"), and at two places in the North Sea, the most southern 

 locality being Lat. 5633'^, Long. i c 47'E., 47 fath. (by the "Thor"). Lo Bianco's statement on its occurrence 

 in the Mediterranean is of course wrong. On the Atlantic side of America it has been recorded from Gulf of 

 St. Lawrence, 50 — 70 fath. (S. I. Smith) and from two places at Labrador, one among them with 80 fath. 

 (Caiman) , finally on the Pacific side from two localities on the south coast of Alaska, one among them with 

 6—8 fath. (Caiman 1. 



10. Leucon Nathorstii Ohlin. 

 (PI. I, figs. 5a— 5b.) 



1901. Leucon Nathorsti Ohlin, Bih. till K. Sv. Vet. Akad. Handl. B. 26, IV, No. 12, p. 41, figs. 9 a — 9c. 

 1913. — nathorsti Stebbing, Das Tierreich, 39. Lief. p. 68. 



Some additions, together with two figures, may be made to Ohlin s brief description. My numerous 

 specimens are rather small; a female with marsupium from Jan Mayen measures only 4.5 mm in length, while 

 Ohlin says 7 mm. Pseudorostrum is not quite as long as figured by Ohlin, and shaped about as in L. fulvus 

 G O. S. The frontal lobe has always a single and distinct, acute tooth on each side ; I have inspected more than 

 thirty specimens from Jan Mayen and every specimen from the other localities without finding any exception. 

 When the antennulse are in a horizontal direction their peduncle terminates vertically below the end of pseudo- 

 rostrum; the outer flagellum is as long as the terminal joint of the peduncle, and its first joint is considerably 

 longer than the two other joints together. Third maxillipeds on the proximal two-thirds of the lower side of 

 second joint with a longitudinal row of small, feeble teeth; fourth and fifth joints each with 2 spiuiform teeth 

 on the outer margin and 1 tooth distally on the lower side. First pair of legs (fig. 5 a) rather slender; second 

 joint with only two spines very remote from one another on the lower side; fourth joint without any distal 

 tooth on the outer margin; sixth joint a little shorter than fifth and much longer than seventh. Second legs 

 with the terminal joint nearly as long as the carpus. Fig. 5b exhibits the left uropod of an adult female; it 

 is seen that the endopod is conspicuously longer than the exopod, and its proximal joint a little more than 

 twice as long as the distal ; the number and relative length of the spines scarcely need any description. 



Occurrence. Taken by the "Ingolf" at two stations. 



Davis Strait: Stat. ^2: Lat. 66 C 35'N.. Long. 56°38' W., 318 fath., temp. 3.9°; 6 specimens. 



North of Iceland: Stat. 126: hat. 67 i<)' N., Long. 15 52' YV, 293 fath., temp. ^0.5°; 5 specimens. 



