CRUSTACEA JIALACOSTRACA. 



Mag. sc. H. Jonsson, First L,ieutenant in the navy E. Jensen have made smaller contributions. 

 In 1903 and following 3'ears Dr. J. Schmidt the leader on the investigation-steamer Thor> collected a 

 large material of Crustacea, both pelagic and bottom forms, in the waters round the Faeroes and 

 Iceland, especially south of Iceland. Dr. Schmidt has brought home a number of Euphausiacea 

 and Mysidacea, as also some Decapoda, which have not previously been taken within the region 

 mentioned. 



In my earlier work on the ]Malacostraca from West Greenland, I have given a complete list 

 of the Danish and Swedish sources from which the material then described was derived; I may there- 

 fore merely refer here to that report, published in 1887. Since then, Prof. D. Bergendal (of Lund) 

 and Mag. sc. M. P. A. Trausted t have made a number of dredgings at several places along the west 

 coast of Greenland and have each brought home forms of interest; smaller contributions are due to 

 Captain in the navy C.Ryder, Pastor H.Sorensen and others. Further, considerable tracts along the east of 

 Greenland from ca. 65 '/i N. L. to ca. 74 ','2 N. L. have been investigated by three Danish expeditions, 

 conducted respectively by Capt. in the navy C. Ryder in 1S91— 92 and by Capt. in the navy G. Am drup in 

 1898 — 99 and 1900. On the first of these expeditions the collections were made by Cand. E. Bay and 

 Cand. med. H. Deichmann, on the last two by respectively Cand. med. K. Poulsen and Mag. sc. 

 Soren Jensen. Lastly, Mag. sc. C. Kruuse has brought home a number of forms from the region 

 about Angmagsalik. 



In addition to the mentioned sources of the material dealt with here there is still another, but 

 it must be mentioned by itself. In 1902 Dr. J. Hjort carried out investigations with his steamer 

 jNIichael Sars in the waters between the Fairoes and Shetland, also east, south and south-west of 

 the Faeroes and to a small extent north-west of these islands. Cand. mag. Ad. Jensen was one of 

 the accompanying naturalists and brought home numerous Crustacea ~ especially the smaller forms 

 living on hydroids etc. — but the great majority of the class mentioned were collected by Dr. A. 

 Appellof and taken to the Bergen Museum. A part of this material, which came from the warm 

 area, was at my request kindly handed over to me for investigation and is included in the follow- 

 ing pages. 



It is a relatively moderate number of species of IMalacostraca which have been collected by one 

 or several of the Danish or foreign expeditions which have not likewise been taken by the Ingolf?. 

 On the other hand the <:Ingolf» has taken hundreds of species which have not been found by any 

 other within the waters in question, and a large number of these species are also new to science. 

 This with the foregoing explanation is the reason why I have included and endeavoured to 

 collect in one place all that could be found in the Copenhagen Museum and in the 

 literature, in order to throw light on the Crustacean fauna of the waters round our 

 northern dependencies. — My paper on the Malacostraca of West Greenland, published in 1887, 

 was based almost to an equal extent on material belonging to the Copenhagen :\Iuseum and to the Riks- 

 museum in Stockholm; our Museum's part of that material has again been examined along with the 

 material from the Ingolf \ Where many localities are noted in the work mentioned for any species 

 only a summary of these is given here, but if very few localities are mentioned these are again noted ; 

 errors in determination are, it need hardly be said, distinctly pointed out. 



