38 AXEL OHLIN, ARCTIC CRUSTACEA. 



the form of telson and rostrum as in Sahinea Sarsii as fign- 

 red by Smith, Spence Bate. and Bikula. Thus, I consider like 

 Smith, Särs, Hansen, Stebbing, Birula and others Sahinea 

 scptemcarinata and Sahinea Sarsi as »good species». 



Even if one had some hesitation with regard to this, 

 every doubt must disappear after the important discoveries 

 that Särs has published about the metamorphosis of the 

 Crangonidce. In the paper cited above he ligures^ the telson 

 of very small individuals of both species, and even in these 

 young stages, the difference between both is still niore strik- 

 ing than in older ones. 



Disfribufion: This is one of the most common decapods 

 in the Arctic Ocean. It has been obtained off nearly every 

 coast. Thus, I enumerate the following places: "Western 

 and Xorthern coasts of Norwa}', Spitsbergen, Barents Sea, 

 White Sea. Nova Semla, Siberian Polar Sea, Smith Sound, 

 Baffin Bay, Davis Strait, Nova Scotia, New England, East 

 Greenland, Iceland. Thus it is to be considered as Arctic 

 and circumpolar. Sahinea Sarsii is occurring off North Eastern 

 coast of U. States, off Nova Scotia, off South Western coast 

 of Greenland, v^here Sahinea se^itemcarinata is also rather 

 scarce (Hansen), off Western coast of Norway up to the Lo- 

 foten Islands. 



The vertical range of Sahinea septemcaHnata extends from 

 a few up to 300 meters; that of Sahinea Sarsii seems to be 

 more or less the same. 



Doflein^ suggests that Sahinea septcmcarinata is an in- 

 habitant of muddy bottom. In this I cannot agree with 

 him; both my own experience and the statements of others fail 

 to confirm that. In the list of localities one will find 

 rocks, gravel, sand, and algse as common as mud. 



Lengtlt of greatest spec, a female. from stat. 3'' in 1899 



81 mm. 



Nearly all fuli-grown females were carrying eggs. 



1 1. c. p. 180, tab. XV, tigs. 24. 25. 



2 \. c.' p. 328. 



