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PROCEEDINGS OF THE NATIONAL MUSEUM 



It differs sharply from pacijicus in lacking coarse tubercles on the 

 carapace and in the complete absence of any postorbital spines or blunt 

 processes, in the relatively shorter rostrum, in the shape of the anterior 

 margin of the antennular lamina (figs. 3a and 4a) , in the smaller hori- 

 zontal alar spines, and in the presence of only one pair of spines on the 

 lateral margins of the telson in addition to the subapical and apical 

 spines. 



In intermedins, pacijicus, and hawaiensis the tergal spines from the 

 last abdominal somite are almost obsolete. 



Figure A.—Lophogaster hawaiensis Fa.ue, from Albatross station 4101 : a, antennular lamina; 

 b, antenna! scale; c, wing of carapace; d, telson; e, apex of telson. 



