﻿Crustacea Malacostraca. 



By 



H. J. Hansen. 



Introductory Remarks. 



It will be useful to iutroduce the treatmeut of this sub-class witli 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 Fceroes, lastlv eastwards to a line drawn almost due north from the 

 Fteroes to Jan ]\Ia\en. It goes without saying that all the material brought home by tlie <: Ingolf 

 is included in the following pages, but I ha\-e also thought it right to include all the material which 

 other Danish expeditions, special zoologists or others not experts (officers of tlie navv or officials in 

 our northern dependenc\) ha\-e collected at Greenland, Iceland and the Faeroes, and which is preser\'ed 

 in the Copenhagen ;\Iuseum ; 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. L., the waters west of a line from the 

 Faeroes northwards to 68' N. L., 6^/-" W. L. and from there to Jan IMayen (at ca. 71' X. L., S \V. L.), 

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

 likewise to about 60' N. L. This work contains all that is known concerning the Malaco.straca in the 

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



Our Museum is rich in Crustacea — especially Malacostraca — from the F;croes, Iceland and 

 especially Greenland, and it mav be permitted to mention here the ])riucipal sources (apart from the 

 ^ Ingolf ). At the Faeroes, Dr. phil. Th. Mortensen has made a vcr\- considerable number of dred- 

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

 Jorgensen. At Iceland, collections ha\-e been made especiall\' bv Dr. jihil. A. C. Johansen and 

 Mag. sc. R. Horring both of whom have also made collections at the I'lerocs during short sojourns 

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

 fjord.s, and Vice-Admiral C. Waudel has brought home a numlier of fiirms from the deep water round 

 Iceland (and from Davis Straits); several other.s, as Mag. sc. A. Di tlevsen, Cand. mag. B. SKuiuudsson, 



Tlie Ingoh-Expedition. III. 2. I 



