140 



PROCEEDINGS OF THE NATIONAIi MUSEUM 



Maxilliped with two coupling hooks. Apex of male first pleopods 

 shorter than is usual for members of this genus. 



Character of hody. — Flattened with ovoid lateral outline. The most 

 conspicuous features are the absence of chromatophores and eyes 

 and the presence of very large epimeral spines. Body smooth on dorsal 

 surface, lacking any conspicuous setae. Some microscopic setae are 

 present especially at the borders of each somite. 



Cephalon. — Wider than long. Anterior border triangulate with 

 convex anterior portion of upper lip visible in dorsal view. Lateral 

 borders occupied by the insertion of the first antennae. Eyes lacking, 

 dorsolateral ovoid muscle insertions are evident in a position where 

 they might be mistaken for eyes. 



Figure 25. — Pleurogonium californiense, new species: a, Holotype male; b, left uropod, 

 holotype; c, operculum, allotype; d, left first antenna, holotype. (Magnification as 

 indicated by scales: d same as b.) 



