THE GKAPSOID CRABS OF AMEKICA. 



Family GRAPSIDAE. 



13 



Atlantic. 

 Goniopsis crucntata. 

 PacJiygrapsus maurus, 

 Pachi/grapsus mannoratiis. 

 Glpptograpsus jauiaiccnsis. 

 Scsarwa reticulatum. 

 Scsarma curacaocnse. 

 Scsarma cincrcum. 

 Sesarma micrsii iheringi. 

 Scsar)>ia rohcrti. 

 Cyclograpsus integer. 



Pacific. 

 Goniopsis pulchra, 

 Pachygrapsus crassipcs. 

 Pachygrapsus puhcsccns. 

 Glyptograpsus iiiiprcssus, 

 Sesarma acquatoriale. 

 Scsarvia rhizophorac. 

 Scsarvia occidcntale. 

 Sesarma hiollcyi. 

 Sesarma angustum. 

 Cyclograpsus cinereus. 



Family GECARCINIDAE. 



Cardisoma guankumi. 

 Vcidcs cor da t us. 

 Gecarci litis ruricola. 

 Gecarcinus lateralis. 



Ocypode albicans. 

 Uca maracoani. 

 Uca Iicicrochclos. 

 Uca spcciosa. 

 Uca suhcylindrica. 



Cardisoma crassum. 



Vcides occidcntalis. 

 ^Gecarcimis quadratics. (Also on the 

 1 Atlantic side of the Isthmus.) 



Family OCYPODIDAE. 



Ocypode occidentalis. 

 Uca vwniUfcra. 

 Uca princcps. 

 Uca crcnulata. 

 Uca stenodactylus. 



SPECIES ON BOTH SIDES OF THE CONTINENT. 



Family GRAPSIDAE. 



Grapsus grapsus.* 



Geograpsns lividus. 



Pacliygrapsus transversus.* 



Planes minutus.* 



Cyrtograpsus angulntus. 



Scsarma (llolometopus) angustipes. 



Aratus pisonii. 



Family GECARCINIDAE. 



Gecarcinus guadratus. 



Uca inordax. 



Family OCYPODIDAE. 



KEY TO THE SUBTRIBES OB" THE TKIBE BBACHYUKA.' 



A*. Mouth field (endostome) prolonged forward to form a gutter. Last pair 

 of legs normal or abnormal. Female openings generally sternal. First 

 abdominal limbs of female wanting. Gills few Subtribe Oxystomata. 



^The keys are taken almost bodily from Borradaile's On tbe Classification of the 

 Decapod Crustaceans, Ann. Mag. Nat. Hist., ser. 7, vol. 19, 1907, pp. 477-483. The 

 names In the right hand margin which are printed in capitals indicate the families and 

 higher divisions treated of In this volume. 



