BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 26. AFI>. IV. N:0 12. 41 



Its ■ bathymetrical distribution ranges from oO to oOO 

 fathoms. 



Length of young male 9,5 mm. 



breadth :^ -^ » 1,2 » 



lengtli » adult female 11 >; 



breadth » » :> 1,3 » 



Norwegian spec, females, acc. Särs . . . !I » 



Leucon nasicoides Lilljeborg. 



1856. Leucon nasicoides Lilljeborg, Om Hafs-Crustaceer vid Kulla- 

 berg etc, 1. c. p. 122. 



1869. » i) G. O. Sars, Uudersögelser över Christiauia- 



Ijordens Dybvandsfauna 1. c. i). 345. 



1900. » -> idcm, Cumacea, p. 31, pl. 23. 



Of this specie.s first described by Lilljeborg from speei- 

 mens from ()resund, there is, in the collections, only a single 

 female from 



stat. 20. lat. 74^35' N., loug. 18 23' W., S. of Little Pendulum Is- 

 land, depth 18 — 21 ni., sandy mud, algas, 6/VII, 1899. 



Leucon nasicoides is easily distinguishable by its more 

 robnst body, the fuller development of the dorsal erest and 

 by the frontal lobe, which is, in the female, as first pointed 

 out by Sars and, låter on, by Norman,^ armed with three 

 small denticles. 



The species has been obtained in the Cattegat, along the 

 Norwegian coast as far as the Lofoten Islands, off West 

 Greenland (Hansen), off East Greenland (Ohlin), and off the 

 Atlantic coast of North America (Smith). 



Its vertical range is from some few fathoms to 50 fathoms. 



Length 5,5 mm., breadth 0,8 mm. 



Leucon Nathorsti n. sp. 

 Fig. 9 a— c. 



Among the collections of Cumacea coUected by me during 

 the expedition of 1898, there was a considerable number of 

 a small Lenconid found at the same locality, viz., King 

 Charles Island, which I first regarded as identical with Leucon 



^ Crustacea, Cumacea etc. 1. c. p. 72. 



