334 ME. E. J. MIEES'S EEVISION OF THE HIPPIDEA. 



Third maxillipedes witli the third joint narrow and similar to the 

 fourth, which is not produced at its antero-external angle. 



It is possible that the three species of this genus belong in 

 reality to one and the same form ; but as I have not the material 

 on which to base an accurate comparison, it may be advisable to 

 consider them for the present as distinct. All are from the 

 western American coast. 



BlEPHAEOPODA OCCIDEIs'TALIS. 



Blepharipoda occidentalis, Randall, Journ. Ac. Nat. Sci. Phil. viii. 

 p. 131, pi. vi. (1839); Gibbes, Proc. Amer. Assoc. p. 187 (1850); 

 Stimpson, Journ. Bost. Soc. Nat. Hist. vi. p. 486 (1857). 



Carapace convex, somewhat obliquely elevated toward the centre, 

 which is faintly carinate ; a median transverse sinuous impression, 

 behind which the surface is polished, but anterior to it densely 

 marked with small transverse impressions, most of which are pec- 

 tinate and hairy ; a lateral transverse impression and a very 

 profound oblique one connected with it inferiorly ; frontal edge 

 strongly 3-toothed, and excavated between the teeth ; a distinct 

 postfrontal transverse groove, behind which is a strong tooth ; 

 antero-lateral margin of the carapace with four stout teeth on 

 each side, posterior margin excavated : second, third, and fourth 

 pairs of feet more or less roughened laterally, and with the ante- 

 rior edge minutely dentate ; anterior pair stout ; arm with a strong 

 tooth near its anterior inferior extremity ; carpus elongate, rather 

 convex, laterally impressed, and having on its upper anterior edge 

 a great spiniform crest, which is itself bordered with smaller 

 spines ; hand flattened on the side, and armed with two or three 

 strong sharp teeth, having between them a great multitude of 

 impressions similar to those of the carapace ; pincers flattened, 

 acute at tip, and armed with sharp spiniform teeth both on their 

 outer edges and on their prehensile side. Length about 2 inches. 



Hah. California, San Diego {Bandall, Stimpson)-, Monterey 

 {Coll. Brit. Mus.). 



The above is Eandall's description. 



There is in the collection of the British Museum a very much 

 mutilated specimen of this species, gummed in detached fragments 

 on cardboard, from Monterey, California, the imperfect condition 

 of which precludes the possibility of description. It may be 

 noted, however, that the anterior margin of the palm and the 

 outer margin of the mobile finger are armed with a series of four 

 spines, which decrease in size toward the articulation and are 



