VOL 



181 



xvi,-i 



i«. J 



PROCEEDINGS OF THH NATI(3NAL MUSEUM. 



241 



There are no iidult specimens in the eollection. The hugest specimen 

 is a female measurin}»- 15 millimeters long, 35 wide inclnding- spines, and 

 2U wide between the bases of the spines. The long earpal spine reaehes 

 nearly to the base of the si)ine on the manus, and is no longer in the 

 young males. Tiie granulated ridge on the posterior portion of the 

 g.istrie region is triangulate instead of ^-shaped, as in spinirarpus. 

 There are f(mr spines on the inner margin of the merus of the (■helii)eds. 

 The i)ostero-lateral angles are strongly upturned. The surface is iri- 

 descent. 



Gulf of California and west coastof Lower (Jalifornia, IJ. S. Fish Com- 

 mission steamer Albatross, 188!): 



Family OCYrODlD.E. 



Subfamily CAliClNOPLACiNyE. 



(Jiuus CBDIPLAX.* 



Carapace very convex longitu<linally, mu(;h resembling PfuiopfUK in 

 general appearance. Anteio-lateral margin, with Ibui' teeth besides the 

 postorbital. Eyestalks stout, orbits large, external hiatus broad. 

 Antennae and nnixilliiieds much a^ iu Fanojwus. Hands elongate; 

 ambulatory legs flattened. 



This genus belongs to that section of the Carciuoplacin;e in which 

 the post abdomen of tin; male does not cover the sttunum between the 

 tifth pair of legs. Although the classitication in this subfamily is based 

 largely on the arrangement of the segments of the abdomen in tlie male, 

 it is true that there is a correspondence in the sexes in the width of the 

 basal segments of the abdomen as compared with the width of the adja- 

 cent sternal segments. Tiieretbre, although the species at hand is 

 represented by females only, I feel justihed in referring them to that 

 group characterized by having only the anterior portion of the last 

 segment of the sternum e.ximsed. Tliere are (bur described genera, in 

 this groui): iiVry/y/Z^.r Stimpson has the antenna; excluded from the 

 orbit by the enlargement of the suborbital lobe; Eucratopsh Smith 

 has very heavy chelipeds; in (fh/ptoplax Smith the merus. joint of the 

 exterior maxillii)eds is trianguiate, tiie hands are large and the front 

 nearly horizontal. In Pamplax Stimpson there are but three distinct 



* OirU'w, to become swollen ; ttAu^, anything flat and broad; carapace. In analogy 

 with OUtT^ovc: (oWf (j-f ToiV), the swollen- footed. 



Troc. N. M. 03 10 



