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BULLETIN 201, UNITED STATES NATIONAL MUSEUM 



29° N. having been filled by the collection from San Francisco re- 

 ported on by me in 1932, which came from approximately 38° N. 

 Apart from the original material of Neomysis rayii described by Mur- 

 doch from Alaska in latitude N. 72°, and the single original specimen 

 of Neomysis franciscorum described by Holmes from San Francisco, 

 all other known specimens of these two species have been examined by 



Figure 69. — Neomysis rayii (Murdoch): a, Telson, X 17%; b, fourth pleopod of male, 

 X 17%. (From one of Murdoch's cotypes.) 



me, and the results are given in the two papers already referred to 

 (1932b and 1933) and in the present paper. 



As a whole the material falls into three groups : 



(1) Material from latitude N. 56° to 72°. Shallow water, 4 to 21 

 fathoms. Rostral plate more than half as long as broad; eye 2y 2 

 times as long as broad; terminal portion of the telson between the 

 last pair of spines on the lateral margin and the apex shorter than 

 broad; distal joint of the exopod of the fourth pleopod of the male 



