284 STALK-EVED CRUSTACEA 



small, allowing the external antenn.x to enter the orbit. 

 External maxillipedes with fourth joint as broad as long. 

 Range. — Atlantic and Pacific Oceans. 



Synopsis of the Species. 



A. Sides with one tooth behind the external orbital 

 angle. 



a. Posterior distal angle of fourth joint of the last pair 

 of legs dentate. 



1. Fingers of first pair of legs smooth. — (P. traus- 

 versus.) 



2. Fingers of first pair of legs dentate or spined above. 

 — {P. graci/is?) 



I. Pachygrapsus transversus. 



Pacliygrapsiis transversus . Gibbes, Kingsley, Miers. 



PacJiygrapsus lcEvimanns\ . 



_, , . . . Stimpson. 



Pacliygrapsiis so cms \ 



Pachygrapsiis advciia . . . Catta. 



PachygrapsHs intennediits . Heller. 



Leptograpsus rcgiilosus . . Milne Edwards. 



Goniograpsus innotatus . . Dana. 



MetograpsHS duluHs et uiiniatiis Saussurc. 



G raps lis dcclivifroiis. . . . Heller. 



Carapace depressed, shining, oblique on the branchial 

 regions. Sides generally slightly bowed, with one tooth 

 behind the orbital angle. Frontal lobes prominent ; front 

 stinuate. Fourth joint of first pair of legs with transverse 

 rugae, the inner margin dentate ; fifth joint rugose, with 

 an internal rounded tubercle. Hand minutely granulate, 

 a longitudinal ridge on the lower outer surface, margins 

 rounded ; fingers with the upper margins smooth. The 

 posterior distal angle of the fourth joint of the last pair of 

 legs dentate. 



