A REVIEW OF THE MYSIDACEA 



201 



1882-83, L. Stejneger collector, 7 immature; Petropavlovsk, Albatross 

 1906 collection, 1 adult male, 1 adult female, breeding, 20 mm. Japan, 

 Tomakomai, Albatross 1906 collection, 2 adult males, 20 mm. 



Distribution. — Kamchatka (Dershavin) ; Alaska (Schmitt) ; Japan 

 (Ii). The present material adds nothing to the known distribution 



Figure 79. — Neomysis czerniawskii Dershavin: a, Antennal scale, X 25; i, telson, X 26; 

 c, fourth pleopod of male, X 26. 



of the species, which is evidently widely distributed in shallow water 

 in the north Pacific both on the American and Asiatic shores. 



Remarks. — This species may be recognized by the following char- 

 acters: (1) The free thoracic somites and the first five abdominal 

 somites are furnished with two or three furrows and ridges most 



