554 ï^ Stephensen. 



Zoogeographical remarks on the Malacostraca and 

 Pycnogonida of the Greenland fauna. 



Since H. J. Hansen wrote his great work on the "Malacostraca 

 marina Groenlandiæ occidentalis eller Oversigt over det vestlige 

 Grønlands Fauna af malakostrake Havkrebsdyr" in "Vid. Meddel. 

 Naturh. Foren.", Kjøbenhavn 1887, pp. 1 — 226, in which the older 

 literature on the Crustacea of Greenland is summarized, only a single 

 work has appeared with a complete list of Greenland's Crustacea, 

 namely that of Vanhoffen: Crustaceen in Drygalski "Grönland-Exp. 

 d. Gesellsch. f. Erdkunde zu Berlin 1891—93", vol 2, Berlin 1897, 

 p. 193 and p. 279. 



Of large new works which give lists of northern animals, including 

 the Crustacea of Greenland, there are only 3, namely, "The Danish 

 "Ingolf" Expedition", "Nordisches Plankton" and "Fauna arctica". 

 Of the "Ingolf" publications referring to the present groups we have 

 only Meinert's Pycnogonida 1899 and H. J. Hansen's Malacostraca I 

 1908 (Decapoda, Euphausidacea, Mysidacea); in "Nordisches Plankton" 

 and in "Fauna arctica" most of the Crustacean groups have been 

 dealt with. With regard to smaller papers with reports on expedi- 

 tions and the like, reference may be made to the list of literature. 



In his "Report on the Echinoderms .... Danmark Expedition" 

 (Medd. om Grønland, vol 45, 1910, pp. 287—289) Dr. Th. Mortensen 

 gives a brief review of the hydrographical conditions at Greenland, 

 and reference may be made to that paper for these conditions. 

 Without expressly emphasizing it^ Mortensen places the boundary 

 for the Greenland fauna midwaj»^ in the great oceanic depths west 

 and east of Greenland, and as this boundary is a practical one, it 

 is used for convenience here. 



Vanhöffen Ц897, 1. с.) mentions in all 278 species of Greenland 

 Malacostraca and Pycnogonida, namely 24 Decapoda, 4 Euphausidacea, 

 13 Mysidacea, 16 Cumacea, 165 Amphipoda, 28 Isopoda, 8 Tanaidacea, 

 20 Pycnogonida. Only 15 years after Vanhöffen's list we now have 

 357 species, as will be seen from the following list. * means, that the 

 species mentioned is not in Vanhöffen's list; the name in ( ) refers 

 to the author who first noted the species as belonging to Greenland. 



Decapoda. 1. Chionoecetes opilio O. Fabr. 



2. Hyas araneus L. 



3. — coarctatus Leach. 



*4. Neolithodes Grimaldii M.-Edw. & Bonnier (H. J. Hansen 



"Ingolf 1908). 

 *5. Lithodes Maja L. (ibid). 

 *6. Paralomis spectabilis H. J. H. (ibid). 



