630 ME. G. H. CAEPElfTER OS 



these two forms can be regarded as more than varieties of a 

 widespread, dominant, and plastic species. In separating them 

 I have been guided chiefly by the length of the neck and the 

 structure of the feet. In most of the specimens classed above 

 as grossipes, the eye-eminence is more pointed than in Sars's 

 figure of that form, while in one (E. 27) the propodus is almost 

 straight as in mixtum. In the examples which I have referred 

 to mixtum, the neck is elongate, the eye-eminence, as a rule, 

 very acuminate (though in some examples it is not more pointed 

 than in typical grossipes), and the propodi straight. Yet the 

 proportion between the terminal joints of the palps is rather 

 that which Sars gives as characteristic of grossipes, while the 

 propodus is longer proportionally as compared with the tarsus 

 than in his figure of mixtum. In size the egg-bearing males 

 (E. 31), which I refer to mixtum, are intermediate between Sars's 

 dimensions for that form and for grossipes. The variation in 

 these specimens, taken in conjunction with the fact that both 

 forms seem to occur together, tends to support Wilson's view 

 that mixtum cannot be specifically distinguished from grossipes. 



N. grossipes has an immense range, having been found in all 

 Arctic seas, and as far south as Long Island Sound on the 

 Atlantic coast of North America, while it has been dredged from 

 depths varying between 12 and 750 fathoms. 



Ntmphon Sltjiteei, Hoeh. 



E. 19. Lat. 77° 55' N., long. 53° 16' E. ; 130 fms. 13 July, 

 1897, 8 P.M. 1 male. 



This specimen agrees closely with Sars's figures and descrip- 

 tions, as well as with the dimensions which he gives for adult 

 examples of this species. It is evidently a scarce form, having 

 been as yet only recorded from the Barents and Kara Seas at 

 depths varying from 20 to 190 fathoms. Through the kindness 

 of Prof. D'Arcy "W. Thompson, of Dundee, the Dublin Museum 

 possesses a specimen from Davis Straits, which differs from 

 the eastern examples of the species in its less acuminate eye- 

 minence. 



Ntmphon" lon&itaese, Kroyer. 

 E. 12. "West Bay, surface. 5 July, 1897. 1 male. 

 This specimen agrees closely with Sars's descriptions and 

 figures. The species seems somewhat scarce, but has a wide 



