18 AXEL OHLIN, ARCTIC CRUSTACEA. 



my specimens of Hyas coarcfafiis from the harbour of Tromsö, 

 some of which were egg-carrying females (although of a remark- 

 ably small size) present the typical appearance and are, at 

 the very first glance, to be distinguished from specimens of 

 Hyas arancus. 



Length of carapace of largest spec: öO mm., breadth 38 mm. 



2. Hyas coarctatus Leach. 



1815. Hyas coarctatus Leach, A tabular view etc, L c. p. 329. 



1853. » » Bell, Hist. Brit. Stalk-eyed Crust, p. 35. 



1879. » » Smith, Stalk-eyed Crust. AtL Coast Nortli 



America, b c. p. 43. 



1893. » » Rathbun, Catalogue of the Crabs of the Fa- 



mily Maiidse etc. 1. c. p. 69. 



1893. » » A. Milne Edwards et Bouvier, Brachyures 



Anomures, 1. c. p. 19. 



1897. » coarctata BiRULA, Essai d'une faune des crustacés déca- 

 podes etc, 1. c. p. 445. 



Localities: 



in 1899: 



Tromsö depth 60 — 70 m., 22/yi several spec, Wulff. 



Distribution: This species occurs in the same träets of 

 the ocean as the preceding species, viz. the North Atlantic 

 and Arctic. Therefore, it is snperflnous to reiterate the loca- 

 lities where it has been observed. It goes southwards on the 

 Enropean side of the Atlantic to the British Channel, and, 

 on the American side, to the coasts of New Jersey and Long 

 Island. It has not yet been obtained ofF Spitzbergen or East 

 Greenland. It goes on the west coast of Greenland as far 

 north as Waigat and Hare Island. Stimpson has reported it 

 from the Behring Sea, and Brandt from the Sea of Ochotsk, 

 the latter distingnishing it by the name of »var. alutacem. 

 Stimpson snbsequently describes a new species, viz. Hyas 

 Intifrons from the Behring Sea. Smith suspects that he nsed, 

 for the description of this species, specimens referred by him, 

 a few months previonsly, to Hyas coarctatus. 



That species, according to Smith, seems to be distinct from 

 the North Atlantic Hyas coarctatus; but Rathbun, v^ho has 

 examined a gr«at nnraber of specimens, takes an opposite 



