A REVIEW OF THE MYSIDACEA 49 



latitude 39°29' N., longitude 72° 1' W., 452 fathoms, September 8, 1882, 

 1 male; 1122* (identified by S. I. Smith) ; Albatross stations 2046, 39 

 specimens, mostly immature; 2213, 5 specimens, immature; 2230, 1 

 male; 2233, 1 male, 1 female; 2237, 1 female. S. I. Smith identified 

 specimens from Albatross stations 2171*, 2179*, 2180*, 2201*, 2202*, 

 2429*, 2546*, 2689*. As far as I can ascertain the records of speci- 

 mens identified by S. I. Smith have not been published. 



Distribution. — This species is quite common off the northeast coast 

 of the United States in depths of 335 to 1,168 fathoms. Its distribu- 

 tion extends across to Norway, the west coast of the British Isles, and 

 to the Bay of Biscay, in the deep and warmer waters of the Atlantic 

 and Arctic Oceans. 



Remarks. — The type specimen of Pseudanchiahcs megalolepis 

 Caullery proves on examination to be a specimen of Boreomysis 

 tridens. Sars, in the Challenger report (1885, p. 183), inadvertently 

 refers to this species as B. tricornis. Verrill's records of this species 

 in 1882 and 1884 refer to the specimens from Fish Hawk station 1122, 

 which were identified by S. I. Smith. Verrill (1885) records this 

 species as follows: "-B. range, 351-500 fathoms, 1880, 1882, 1883. 

 Common in the trawl wings." The records for 1882 and 1883 refer to 

 specimens from Albatross stations 1122, 2171, 2179, and 2180, all iden- 

 tified by S. I. Smith, but I cannot trace the records for 1880. There 

 are no specimens in the material submitted to me for examination nor 

 are there any specimens in the National Museum collections that were 

 collected in that year. Figure 7 shows the salient characters of this 

 species and will help in its identification. 



BOREOMYSIS ARCTICA (Kr0yer) 

 Figure 8 



Mysis arctica KR0yer, 1861, p. 34, pi. 1, fig. 5a-f. 



Boreomysis arctica G. O. Sars, 1869, p. 330, 1879a, p. 10, pis. 11-13.— S. I. Smith, 



1881, p. 445.— Fowler, 1912, p. 540.— Stephensen, 1913, p. 67 ; 1933, p. 11.— 



Tattersall, 1939b, p. 282. 

 Arctomysis arctica Czerniavsky, 1887, p. 7. 



Occurrence. — East coast of North America : Fish Hawk stations 

 952, latitude 39°55' N., longitude 70°28' W., 396 fathoms, yellow mud 

 and sand, August 23, 1881, 3, immature; 994, latitude 39°40' N., longi- 

 tude 7l°30' W., 368 fathoms, brown mud, September 8, 1881, 1 adult 

 male, 1 immature; 1029, latitude 39°57'6" N., longitude 69°16' W., 

 458 fathoms, yellow mud and sand, September 14, 1881, 1 female; 1093, 

 latitude 39°56' N., longitude 69°45' W., 349 fathoms, sand and blue 

 mud, August 11, 1882, 1 immature; S. I. Smith identified specimens 

 from Fish Hawk stations 891*, latitude 39°46' N., longitude 71° 10' W., 

 6 a. m., October 2, 1880, 310 fathoms, trawl; and 937*, latitude 



