54 CRUSTACEA MALACOSTRACA. IV. 



Diastylis Say. 



The collection contains 9 species, one among them new, but an additional species not seen by me 

 was secured by the "Valorous" near Davis Strait, and must of course be included. 



48. Diastylis Rathkii Kr. 



1841. Cuma Rathkii Kroyer, Naturh. Tidsskr. B. Ill, p. 513, 531, Tab. V, VI, Fig. 17 — 30. 



1N46. Kroyer, Naturh., Tidsskr., Ny Rsekke, B. II, p. 144, 207, Tab. I, Fig. 4 and 6. 



angulata Kroyer, Naturh. Tidsskr., Ny Rtekke, B. II, p. 156, 206, Tab. I, Fig. 2, Tab. II, 



Fig. 1, a— i [(?]. 

 1849. — Rathkii Kroyer, in Gaimard, Voy. en Scand., Crust. PI. V. fig. 1, a — u. 



angulata Kroyer, in Gaimard, Voy. en Scand., Crust. PI. V, fig. 2 a — x [<J]. 

 11900. Diastylis Rathkei G. O. Sars, Account, III, p. 44, Pis. XXXIII— XXXIV. 

 ! - Rathkei var. G. O. Sars. Account, III. p. 107, Pis. LXX— LXXII. 



1913. rathkii Stebbing, Das Tierreich, 39. Lief., p. 98 (with the enormous synonymy). 



It may be mentioned that in the marsupium of females from West Greenland specimens have been 

 found of S-pharonella decorata H. J. H., a parasitic Copepod of the family Choniostomatid?e. 

 Occurrence. Taken by the "Ingolf" at 7 stations. 



Davis Strait: Stat. 32: Lat. 66°35' N., Long. 5638' W., 318 fath., temp. 3. 9 ; 8 specimens. 

 Stat. 35: Lat. 65°i6' N., Long. 55°c>5' YV, 362 fath., temp. 3. 6°; 11 specimens. 

 Stat. 28: Lat. 65°i4' N., Long. 55"42' YV, 420 fath., temp. 3.5 ; numerous specimens. 

 Stat. 27: Lat. 64°54' N., Long. 55°io' W., 393 fath., temp. 3.0°; 6 specimens. 

 Stat. 25: Lat. 63"3o' N., Long. 54°25' \V, 582 fath., temp. 3.3"; several specimens. 

 South-East of Iceland: Stat. 4: Lat. 64°07' N., Long. 11 12' YV, 237 fath., temp. 2.5 ; 1 specimen. 

 North-West of the Faeroes: Stat. 138: Lat. 63°26' N., Long. 7°56' W., 471 fath., temp. ^-0.6; 



7 specimens. 

 This species is common at West Greenland; already in 1888 I enumerated 17 localities -- most 

 of them near the coast and 5 among them more distant from land in Baffin Bay or Davis Strait — between 

 Lat. 72 41' N., and 6o° N. ; the depths were most frequently from ab. 10 to 50 fath., but six among them 

 trom 215 to 410 fath. Later it has been found at two places on the same coast not recorded in the literature, 

 viz. at Egedesminde by Prof. Bergendal, and at Holstensborg (Lat. 66°56' N.) by Mag. Traustedt ; Stephen- 

 sen records it from Northern Stromfjord, ab. Lat. 67 : 42' N., 30 fath. and 4 — 11 fath., and from Brede Fjord, 

 ab. Lat. 6i° N., 2 1 2 — 5 and 5 — 8 fath. Ohlin and Ortmann recorded it from two places very far northwards 

 in West Greenland, viz. Barden Bay, ab. Lat. 77^30' N., 20 — 25 fath., and Murchison Sound, ab. Lat. 

 77-30' X., 25 fath. 



The "Thor" gathered this species south-west of Iceland: Lat. 63°46' N., Long. 22°56' W., 80 fath.; 

 at East Iceland it has been taken by Dr. A. C. Johansen in Loons Yik, 40 fath. — Norman records it from 

 a place south-west of the Faroes: Lat. 6031' N., Long. 9°i8' W., 229 fath. — At East Greenland it has been 



