36 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



F'. A shallow, spinulous lobe at postero-distal end of merus 

 of swimming feet. Inner spine of carpus of male 



longer than palm spinicarpus, p. 92. 



F^. No lobe at postero-distal end of merus of swimming feet. 

 Inner spine of carpus shorter than palm. 

 G'. Upper half of outer surface of palm smooth, irides- 

 cent. Chelipeds conspicuously fringed with hair above. 



ordwayi, p. 71. 

 G^. Upper half of outer surface of palm crossed by a 

 longitudinal carina. Hair of chelipeds incon- 

 spicuous; 

 H*. Lateral spine of carapace less than twice as long 

 as preceding tooth. Carapace very convex. 



afflnis, p. 80. 

 H^. Lateral spine of carapace twice or more than 

 twice as long as preceding tooth. Antero- 

 lateral teeth unequal. 

 J'. Lateral spine of carapace twice as long as 

 preceding tooth. Antero-lateral teeth 



closely placed minimus, p. 76. 



J2. Lateral spine of carapace as long as the 

 width of the next three teeth. Front 



prominent pichilinquei, p. 78. 



B^. Carapace with posterior corners angled, armed with a spine or tooth. 

 C. A spine at posterior angles. Lateral spine very long. Merus of 

 swimming feet unarmed. Ten tubercles on carapace. 



tuberculatus, p. 90. 

 C-. A tooth at posterior angles. Merus of swimming feet with postero- 

 distal margin spinulous. Inner spine of carpus of male as long as 

 palm iridescens, p. 93. 



ANALOGOUS SPECIES ON OPPOSITE SIDES OF THE CONTINENT 



Atlantic Pacific 



gibbesii xantusii 



spinimanus brevimanus 



ordwayi angustus 



spinicarpus iridescens 



SPECIES PROBABLY ERRONEOUSLY REFERRED TO AMERICA 



Portunus piisillus Leach, said to be a Californian species by Filhol, Rec. Passage 

 de Vdnus, vol. 3, pt. 2, Mission de I'lle Campbell, 1885, p. 381. 



Nepiunus gladiator var. argentatus White. Payta given as locality by Cano, 

 Boll. Soc. Nat. Napoli, ser. 1, vol. 3, 1889, p. 214. In his geographical list 

 on p. 101, however, this species is not given under Payta. 



Subgenus Portunus 



Carapace very wide, the antero-lateral margin being the arc of a 

 circle with long radius, whose center is near the posterior margin of 

 carapace. Last spine of antero-lateral margin usually much larger 

 and longer than the others. 



