TIIK GKAPSOID OEABS OF AMEEICA. 107 



Measurements. — Female holotype, carapace apparently about 7 

 mm. ^ide; approximate length of legs of second pair, left 8|, right 

 11 mm. 



Range. — Ejiown only from the type-locality. 



Genus PARAPINNIXA Holmes. 



Pscndopinnixa Holmes, Proc. California Acad. Sci., ser. 2, vol. 4, 1S94, 

 p. 505; type, P. nitida (Locliiugton). Not Pscudoplnnlxa Ortmann, 

 1894. 



Parapinnixa Holmes, Proc. California Acad. Sci., ser. 2, vol. 4, 1S94, p. 587. 

 Name substituted for Psetidopinnixa Holmes, not Ortraann. 



Carapace calcified, much broader than long, anterior margin nearly 

 straight, frontal process deflexed. Orbits nearly round. Antennules 

 obliquel}' or transversely plicate, fossettes communicating Avith each 

 other beneath front. Buccal area small, very broadly subtriangular. 

 External maxillipeds with ischium rudimentary, merus large, sub- 

 triangular; palp three-jointed, terminal segment joined to tip of 

 preceding one. First leg largest, others successively diminishing in 

 length, last pair very small. Abdomen of female small, not covering 

 sternum. 



Confined to America. 



KEY TO THE SPECIES OF THE (JENUS PAnAPINNIXA. 



A'. Carapace more than twice as wide as long. Dactyli of ambulatory legs 

 similar. 

 B*. Fingers gaping, prehensile edges without tooth, Propodus of second and 

 third legs small, narrower than their respective merus joints. 



nitida, li. 107. 

 B*. Fingers meeting, movable finger with basal tooth. Propodus of second 

 and third legs large, as wide as their respective merus joints. 



hcndersoni, p. 109. 

 A*. Carapace less than twice as wide as long. 

 B'. Eyes irmall. Dactyli of second and third legs longer and slenderer than 

 those of first and fourth legs. 



C\ Movable finger with tooth near middle afflnis, p. 111. 



C. Movable finger with tooth near base houvieri, p. Ill, 



B*. Eyes large. Dactyli of all legs similar heaufortensis., p. 112. 



ANAr.OGOUS SPECIES ON OPPOSITE SIDES OF THE COXTIXEXT. 



Atlantic. Pacific. 



hcndersoni. nitida. 



honvicri. affinis. 



PAKAPINNIXA NITIDA (Lockington). 

 Pinnixa (?) nitida Lockington, Proc. California Acad. Sci.. vol. 7, 1S76 

 (1877), p. 155 [11], part: "male" (really female) only (type-locality. 

 Angeles Bay, Gulf of California; type not extant). 

 Pscndopinnixa nitida Holmes, Proc. California Acad. Sci., ser. 2, vol. 4, 



1894, p. 5G6, pi. 20, figs, 8, 9. 

 Parajnnnixo nitida Holmes, Proc. California Acad. Sci., ser. 2. vol. 4, 

 1894, p. 587, explanation of figs. 8, 9. 



Diag7iosis. — Carapace more than twice as wide as long. Fingers 

 without teeth and gaping. Dactyli of legs similar, short and hooked. 



