EXPEDITION TO POINT BAKKOW, ALASKA. 



137 



CRUSTACEA. 



DECAPODA. 



BRACHYURA. 



1. CHIONOECETES OPILIO (Fabr.) Kr. 



Tear. 



1780 

 1788 



1838J 

 1849 



1856 



1857? 

 18585 



1867 



is::; 



1875 



1ST!) 



1KW 



Name. 



Cancer phalanaium, O. Fabricius . 

 Cancer opilio, 0. Fabricius 



ChionoccelcA opilio, Kriiycr.. 



Pcloplaslus pallasii, Gerstaeckcr. 



Citation.-. 



Chicnoccctfs bchringianus, Stimpson 



Ctiionoccctes opilio, Packard 



Chionoecftcs opilio, Whiteavcs . 



Chionocctes pltalangiiuit , Liitkcn 



Chionoeceteg opilio, Smith 



Cftionoecetes opilio, Stuxlici^x .. 

 Chionoeeetes opiUo (/), Elliott . 

 Chionomtes opilio, Smith 



Fauna Grrenlandica, p. 234 (sp. 214) (not of J. C. Fabricius, 1775). 

 Iii-t Koiij,'"li;;<> Danske Vidcnsk. Scl-kabs Skr., nyo Samling, iii, 



p. 181, with plate. 

 Naturhistorisk Tidsskrift, i lla-kko, ii, p. 249 (1838) ; in Gaimard, 



Voyages en Scandinavic, en Laponio, au Spitzberg et anx Fcroc, 



Crust.pl. 1. 

 Carcinologischo Beitriige. Arcbiv fiir Xaturycschichte, xxii, p. 



105, pi. 1, fie. 1. 

 Proceedings Boston Society of Natural History, vi, p. 84 (1857) ; 



Journallioston Soc. Nat. Hist., vl, p. 448 (8) (1857) ; Proceedingl 



Academy of Natural Sciences, Philadelphia, 1857, p. 27(23) (1S>8) 



(young). 



Memoirs Host. Soc. Nut. Hist., i. p. 30'-'. 

 Keportona sci-omi dd-p.*c.i dredgliig expodttlon to the Gulf of 



St. Lawn-nee (in 1K72), p. 15. 

 (Nominal) List of tlioit'i-ustacea of Greenland, Arctic Manual, 



p. 146. 



Transactions Connecticut Academy of Arts and Sciences, v. p. 41. 

 Vega-Expeditionens VetcnskapligalakttaRclser. i, pp. 714, 715. 

 A Monograph ot'tlic Seal Islonaa of Alaska, p. 137. 

 Proceedings U. S. National Museum, vi, p. 'JiM. 



Two small males were captured in the rich haul of the dredge, made ten miles west of Point 

 Franklin, in 13i fathoms of water, August 31, 1883. Nordeuskiold found this species very abundant 

 in Bering Strait and in the Arctic Ocean north of the strait. According to Elliott (loc. cit.) this 

 crab is very abundant on the island of St. Paul, of the Pribyloff group, though not found on St. 

 George, and is of great value as an article of food. 



The species is well known from Greenland, where it was originally described, Labrador, and 

 as far south on the American coast as New England (in deep water), from Siberia, the Arctic 

 Ocean, and Bering Strait. 



The specimens obtained agree iu proportions with Stimpson's C. behrinyianus, from nearly the 

 same locality. This species, however, according to Smith, was based 011 young specimens of (7. 

 opilio, such as ours are. 



The specific name plialangium, originally applied to this species, was rejected by Otho Fabricius 

 himself, on the ground, as he expressly states, that he found it preoccupied by Cancer phalang'mm 

 J. 0. Fabricius (Stenorliynchus phalangium M. Edw.). Having been able to consult O. Fabricius's 

 original description of Cancer opilio, I find that it was published in 1788, which settles the question 

 of priority over G. opilio J. C. Fabricius (1793), and establishes the specific name opilio for this 

 species. 



2. HYAS LATIFRONS Stimpson. 



Three large, males were picked up on the beach near the station, one dry, in the spring of 1883, 

 and the other two fresh, August 23, 1882. One small male was also dredged in 13i fathoms, oil 

 the rich bottom of small pebbles, sand, and broken shells, ten miles west of Point Franklin, August 

 31, 1S83. This crab was well known to the natives of Point Barrow, who called it by the name 



I have carefully examined Dr. Stimpson's types of Hi/as latifrons iu the National Museum, and 

 compared our specimens with them. I find our specimens indistinguishable from Dr. Stimpson's 

 types, ;uid differing from a typical Hyas coarctatus from Greenland only in the shape of the rostrum, 

 which is slightly shorter and less acute. 



Smith (loc. cit.) pronounces H. latifrons a good species, and I have accordingly followed his 

 authority in recording the species. 

 11. Ex. -14 - IS 



