A REVIEW OF THE MYSIDACEA 237 



ture specimens ; in washings of oysters, mouth of New Haven Harbor, 

 May 28, 1880, R. Rathbun collector, 1 adult female; New Haven, 

 Conn., identified by S. I. Smith* ; Long Island Sound, 1874, 3 breeding 

 females, 1 adult male; Fish Hawk stations 917, latitude 40°22' N., 

 longitude 70°42' W., 44 fathoms, July 16, 1881, 1 male, 1 female; 934, 

 Nobska Light, 9 fathoms, July 20, 1881, 1 breeding female (another 

 specimen from this station, identified by S. I. Smith, was not examined 

 by me) ; 1242*, Vineyard Sound, 18 fathoms, 10 :50 a. m., September 5, 

 1887, identified by S. I. Smith; Albatross stations 2402, 1 immature 

 female, 12 mm. ; 2603, 1 breeding female, 13 mm., 2 males, 8 to 13 mm. ; 

 no locality, 4 breeding females. 



Distribution. — Smith (1879) has given a full account of the distri- 

 bution of this species on the American coasts as known at that time. 

 Subsequent records, a full list of which is given above in the references 

 to this species, and the long list of records given here, do not add con- 

 siderably to the facts presented by Smith except for the records from 

 Albatross stations 2402 and 2603, which extend the geographical range 

 of the species considerably southward, and for those records which 

 increase its bathymetric range to 124 fathoms. The species is common 

 on the coasts in shallow water from New Jersey to the northern bound- 

 ary of the United States. It has not yet been recorded from Canada or 

 in shallow water to the south of New Jersey. 



Remarks. — The specimens from Fish Hawk station 917 and Alba- 

 tross stations 2402 and 2603 are of special interest. Not only do they 

 come from much deeper water than any so far recorded, but they are of 

 larger size. The largest male from station 2402 measured 15 mm., and 

 an adult male and female from station 2603 measured 13 mm., the usual 

 size of adult specimens being 8 to 10 mm. I thought at first that these 

 deep-water specimens might represent a new species, but a careful 

 examination shows that they cannot be separated from the shallow- 

 water forms by any fundamental characters except their size and the 

 fact that the endopods of the third thoracic limbs are relatively larger 

 and more massive, though essentially of the same form. I figure the 

 chief appendages of these deep-water specimens for comparison with 

 those of the shallow-water form (figs. 100, a-d; 101). 



HETEROMYSIS BERMUDENSIS G. O. Sars 



Eeteromysis iermudensis G. O. Saks, 18S5, p. 216, pi. 38, figs. 1-7. — Vebeill, 

 1923, p. 184. 



Occurrence. — Bermuda ; No. 60, 1876-77, G. Brown Goode, collector, 

 2 females. 



