j6 CRUSTACEA MALACOSTRACA. 



his first work of 1882 had also stated that it was H. aranetis which occurred in the Kara Sea and he 

 does not mention H. coarctatus at that place). It is also very common in Bering Straits to 71 02' N. L. 

 (M. Rathbun); on the east coast of Asia it has been taken at East Cape and Plover Bay (M. Rathbun), 

 on the Corean coast at 37 2' N. L., i2o,°3i'E. L. (Suenson, in Copenhagen Museum), and a small 

 specimen in the Copenhagen Museum is stated by the collector (Capt. Suenson) to have been taken 

 15 miles off Amoy, but this locality which lies at 24 1 2 ° N. L. seems to me for this reason uncertain 

 and perhaps comes from some error. Lastly, on the east coast of America, it has been taken at La- 

 brador, Newfoundland, Gulf of St. Lawrence, Nova Scotia, along the coast of the United States to 

 New Yersey at ca. 40° N. L; and somewhat out from the coast even to 36 41' N. L-, 74 39'W. L. (M. Rath- 

 bun and S. I. Smith). 



The literature contains a very large number of single notices as to the depths at which this 

 species has been taken, and the great majority of these give between 10 and 100 fm., seldom 5 to 

 10 fm. and sometimes 100 — 200 fm. I have found only three statements of greater depths, namely, 

 S.W. of Ireland in 250 fm. (Pocockl, 36°4i'N.L., 74°39'W.L in 373 fm. (Smith, 1884) and 4i°i3'N.L, 

 66° 1' W. L. in 906 fm. (Smith, 1884). All these and especially the last are extremely surprising, as the 

 species thus appears to be a true deep-sea form in the Atlantic, but it should be remarked that there 

 is also a further remarkable anomaly, namely, that a little further south at four stations from 41° 10' N. L. 

 to 40° 20' N. off the east coast of America it has been taken in depths of only 41 to 62 fm. S. I. Smith 

 is so trustworthy an observer that we cannot doubt his determinations, but so long as there is only 

 this one notice one is inclined until further information is forthcoming to fear greatly that it has 

 arisen through some error or another. 



According to this distribution, Hyas coarctatus is essentially a boreal form, which extends to a 

 certain extent into arctic waters but is absent at such purely arctic localities as East Greenland 

 (north of 66° N. B. at least), Jan Mayen, East Spitzbergeu and the Kara Sea. It is thus more typically 

 boreal than H. arane'us, which is also in agreement with the fact that on the east coast of North 

 America it goes much further south than the latter and considerably to the south of Cape Cod; some- 

 times it goes down into greater depths than H. araneus. It is very probably not circumpolar; that 

 its circumpolarity is far from being proved needs scarcely be stated. That the "Fauna Arctica" here 

 as so often is defective and misleading may likewise just be mentioned. 



Remarks. H. coarctatus is much smaller than the previous species. The largest specimen is 

 a male from West Greenland, locality unknown; the carapace is 99 mm. long, 74 mm. broad, the first 

 pair of legs 156 mm. from the lateral margin of the carapace to the tip (on the underside 171 mm. to 

 the sternum), the second leg 174 mm. from the lateral margin of the carapace to the tip. 



7. Portunus holsatus Fabr. 



[798. Portunus holsatus J. C. Fabricius, Suppl. Entom. Syst, p. 366. 



1844. Bell, Brit. Crustacea, p. 109, with fig. 



1861. A. Milne-Edwards, Archives du Museum, T. X, 1, p. 393. 



! 1863. Heller, Crust, siidl. Europa, p. 85. 



