A REVIEW OF THE MYSIDACEA 181 



b 2 . Inner uropod with only 1 or 2 spines on lower margin near statocyst; telson 

 long and narrow, apex narrowly truncate, lateral spines numerous, 

 crowded and not grouped patagona (p. 247) 



meridionalis (p. 247) 



monticelli (p. 248) 



a 1 . Last thoracic somite and first 5 abdominal somites ornamented with furrows 



and ridges developed to a greater or lesser extent mirabilis (p. 198) 



czerniawskii (p. 200) 



Of the 14 species of the genus the following are known from the 

 coasts of America: N. americana from the east coast; N. mercedis, 

 N. rayii, and N. kadiakensis from the west coast from Alaska to Cali- 

 fornia ; N. patagona, N. meridionalis, and N. monticelli from the south- 

 ern part of the coasts of South America; and N. intermedia, N. 

 mirabilis, and N. czerniawskii from the Arctic coast of Alaska and 

 the Bering Islands. I have not seen specimens of any of the South 

 American species, but I give figures of the antennal scale, telson, and 

 fourth pleopod of the male of all the other American species, and such 

 Asiatic ones as I have seen, in the hope that they may serve as a guide 

 to the identification of the species. 



NEOMYSIS RAYII (Murdoch) 



Figuees 68-71 



Mysis rayii Murdoch, 1885a, p. 519 ; 1885b, p. 141, pi. 1, fig. 3. 



Neomysis franciscorum Holmes, 1900, p. 223. — Hansen, 1913b, p. 178, pi. 9, figs. 



3a-b.— Tattersall, 1932b, p. 322, figs. 42-44 ; 1933, p. 8, figs. 3b, 4. 

 Neomysis rayi Zimmer, 1904, p. 470. — Ortmann, 1908, p. 9. 

 Neomysis toion Dershavin, 1913, p. 198, figs. 1-4. 

 Neomysis franciscana W. L. Schmitt, 1919, p. 6 B {lapsus calami). 

 Neomysis rayii Tattersall, 1932b, p. 323. 



Occurrence. — Arctic and Bering Sea regions: Cape Lisburne, 

 Arctic Ocean, August 21, 1880, W. H. Dall collector, 1 female; latitude 

 60° 10' N., longitude 168°45' W., tag 15, Lieut. G. M. Stoney collector, 

 1 immature female, 20 mm.; latitude 61°3' N., longitude 167°55' W., 

 tag 26, Lt. G. M. Stoney collector, 1 immature female, 13 mm.; 

 latitude 62°15' N., longitude 167°48' W., tag 27, Lieut. G. M. Stoney 

 collector, 2 adult males, 30 mm., and 2 immature females; latitude 

 56°30' N., longitude 132°59' W., Horn Cliff, near Petersburg, Alaska, 

 August 18, 1927, H. C. McMillan collector, 1 female; Point Barrow 

 Expedition*, Cape Smythe and Point Barrow, Alaska, cotypes, iden- 

 tified by Murdoch (1885) ; Albatross stations 2863, 7 females; 3235, 

 21 males, 6 females up to 40 mm. ; 3236, 2 adult males, 35 mm. ; 3240, 2 

 females, 35 mm. ; 3241, 6 females, 30 to 35 mm. ; 3243, 6 males, 3 fe- 

 males, 30 mm. ; 3514, 1 male, 28 mm. ; Off Washington : Albatross 



