Crustacea Malacostraca. 



By 



H. J. Hansen. 



Introductory Remarks. 



It will be useful to iutroduce the treatment of this sub-class with a discussion of various points of 

 importance. 



The investigations of the «Ingolf» extended over the eastern part of the seas along the west 

 coast of Greenland from a point a little north of the polar circle to about 58° N. L., two degrees south 

 of Cape Farewell, from there in a north-easterl)- direction towards Iceland, the waters round this island 

 and between Iceland and the Fseroes, lastly eastwards to a line drawn almost due north from the 

 Fteroes to Jan Mayen. It goes without saying that all the material brought home by the <;Ingolfs 

 is included in the following pages, but I have also thought it right to include all the material which 

 other Danish expeditions, special zoologists or others not experts (officers of the navy or officials in 

 our northern dependency) have collected at Greenland, Iceland and the Faeroes, and which is preserved 

 in the Copenhagen Museum ; further, I have included the species given in the literature as having been 

 taken within the region mentioned and which are not represented in our Museum, at least from those 

 areas. The waters included are thus the Davis Straits, Baffins Bay and the narrower seas north of 

 this to as near the pole as the Alert and (Discovery reached, the seas south of Greenland to ca. 

 58° N. L., those along the east coast of Greenland to ca. 75° N. h., the waters west of a Hue from the 

 Fseroes northwards to 68° N. L., 6 2/,° W. L. and from there to Jan Mayen (at ca. 71° N. L., 8^ W. L.), 

 the waters south and south-west of Iceland to ca. 60° and the sea south and south-west of the Fseroes 

 likewise to about 60^ N. L. This work contains all that is known concerning the Malacostraca in the 

 region thus circumscribed, both what our Museum and the literature can show. 



Our Museum is rich in Crustacea — especially Malacostraca — from the Fseroes, Iceland and 

 especially Greenland, and it may be permitted to mention here the principal sources (apart from the 

 «Ingolf ). At the Faeroes, Dr. phil. Th. Mortensen has made a very considerable mmiber of dred- 

 gings from low water out to ca. 100 fm.; a number of forms has also been received from Dr. med. F. 

 J or gen sen. At Iceland, collections have been made especially by Dr. phil. A. C. Johansen and 

 Mag. sc. R. H or ring both of whom have also made collections at the Fseroes during short sojourns 

 there; Mag. sc. W. Lund beck has also collected a by no means small material in the Icelandic 

 fjords, and Vice-Admiral C. Wandel has brought home a number of forms from the deep water round 

 Iceland (and from Davis Straits) ; several others, as Mag. sc. A. D i 1 1 e v s e n , Cand. mag. B. S se m u n d s s o n , 



The Ingolf-Expedition. III. ;. I 



