CRUSTACE \ M iXACOSTRACA. 



x 3 



1838. Chionoecetes Opilio Kreyer, Nat Tidsskr., B. II, p. 249. 



1849. — Voy. en Scand. etc.. Crust. PI. I. 



1856. Peloplastus Pallasii Gerstaecker, Arch. f. Naturgesch., 22. Jahrg., B. I, p. 105, PI. I, fig. 1. 



1893. Chionoecetes Opilio M. Rathbun, Proc. U. S. Nat. Mus. Vol. XVI, p. 74, PL IV, figs. 5—7 (gives 



the synonymy, but incompletely). 

 [8< (4. — A. M.-Edwards &. Bouvier, Res. des Camp. sc. de PHirondelle, fasc. VII, p. 16. 



Occurrence. This species has been taken by the "Ingolf' at the following locality. 

 Davis Straits: St. 31: 66° 35' N. L., 55° 54' W. E, 88 fin., temp. r6°; 1 spec. 



In Malac. Groenl. (p. 28) I have enumerated some localities on the west coast of Greenland; 

 since then I have seen specimens from Ritenbenk, Jakobshavn, Godhavn, Akudlek 30—60 fin. and 

 Holsteeuborg. A summary of our knowledge of its occurrence at West Greenland would read: it is 

 known between 66° 56' N. L. and 70° 42' N. L. from the beach to 350 fm. (the last-mentioned depth, 

 which is very unusual, according to information from Dr. Forsstrand). 



Distribution. This species hat not been found east of Cape Farewell. It is thus not known 

 from East Greenland nor from the seas north of Europe and Asia; it is only on the north-eastern 

 part of Asia near Behriug Straits that it begins at ca. i73°24'W. L- (Stuxberg). Off the east coast of 

 America it is common at Newfoundland (A. M.-Edw. & Bouvier) and goes clown to Nova Scotia and 

 further to Casco Bay, Maine (S. I. Smith). Miss M. Rathbun gives a large number of localities for it 

 from the waters on the north-western part of North America and summarises its occurrence there as 

 follows: "from the Arctic coast of Alaska southward through Bering Strait and along the eastern and 

 western shores of Bering Sea to the Aleutian Islands, where it is found in abundance, and thence east- 

 ward and southward along the Alaskan coast to British Columbia". Further: "It ranges in depth from 

 shallow water to 206 fathoms on the Atlantic coast and 121 fathoms on the Pacific.'' 



It may not be useless to point out distinctly here, that when A. M.-Edwards & Bouvier (1. c. p. 17) 

 begin a summary of the distribution of this species with "Cette espece n'est pas rare dans les mers 

 froides de l'Europe. . .", this statement is quite incorrect. 



Remarks. The largest specimen I have seen is from Jakobshavn; the carapace is 138-5 mm. 

 long and 141 -5 mm. broad, the second leg from the margin of the carapace to the tip 338 mm. 



5. Hyas araneus E. 



1758. Cancer araneus Linne, Syst. Nat. Ed. X, I, p. 628. 

 1780. — — O. Fabricius, Fauna Groenl. n. 213, p. 233. 



1838. Hyas araneus Kroyer, Kgl. D. Vid. Selsk. naturv. math. Afh. Syvende Deel, p. 314. 

 ! 1851. — Brandt, Krebse, in Middendorffs Sibir. Reise, B. II, 1, p. 79 — 80. 



! — coarctatus Hoek, Crust "Willem Barents", Nied. Arch.f. Zool. Supplb. I, p. 3,Taf. I, Fig. 1. 



Occurrence. The "Ingolf has taken this species at the following localities. 

 Baffins Bay: St. 33: 67° 57' N. L., 55° 30' W. E, 35 fm., temp. o-8°; 1 spec. 

 Davis Straits: Holsteenborg Havn, in fishing net; 1 spec. 



— St. 31: 66°35'N. E, 55°54'W. E, 88 fm., temp. r6°; 1 spec. 



