332 CRUSTACEA. 



G. 2. Heterograpsus, Lucas* — Pseudograpso similis. Carapacis latera recta 



postice convergentia, ac in Sesarma. 

 G. 3. Eriocheir, De Kf — Articulus maxillipedis externi 3tiuS ac in Pseudo- 



grapso. Frons dimidio latitudinis carapacis multo brevior. Carapax subpoly- 



gonatus. 

 G. 4. Platynotus, De H.X — Articulus maxillipedis externi otius 2do longior, mar- 



gine postico valde obliquo. 

 G. 5. Trichopus, De J5T.§ — Articulus maxillipedis externi 3tius latior quam lon- 



gus, extus dilatatus. Pedum articuli 5tus Gtusque posticorum compressi dense- 



que ciliati. 



2. Maxillipedes externi rhomboidice Mantes. 



G. 6. GraPSUS, Lamk. — Carapax transversim lineolatus, lateribus plus minusve 

 arcuatis. Frons dimidio latitudinis carapacis brevior. Antennas externa? juxta 

 frontis latera oblique exsertas. Tarsi spinulis armati. 



G. 7. Gontograpsus, Dana.\\ — Carapax transversim lineolatus, lateribus rectis, 

 postice soepe convergentibus. Frons dimidio latitudinis carapacis longior. An- 

 tennas externse sub frontis margine saspius exsertas. Tarsi spinulis armati. 



G. 8. Planes, Leacli.\ — Carapax non lineolatus, laavis, fere quadratus, parce ob- 

 longus. Frons rectus. Articulus maxillipedis externi 8 this latior quam longus, 

 cordatus. Tarsi spinulis armati. 



G. 9. Hemigrapsus, Dana.** — Carapax non lineolatus, fere lasvis, lateribus plus 

 minusve arcuatis. Frons rectus aut rectiusculus, an tennis internis trausvcrsis. 

 Articulus maxillipedis externi Stius fere orbiculato-cordatus. Tarsi inermes. 



G. 10. Cyrtograpsus, Dana. — Carapax gibbosus, subhexagonus non lineolatus. 



* Lucas, Expl. de l'Alger, pi. 2, f. 4. 



f Faun. Japon., p. 32, 59. — Utica of White (Ann. Mag. Nat, Hist., xx. 200, and 

 Crust. Voy. Samarang, 52, pi. 13, fig. 6). 



The E. penicillatus of De Haan (p. 60, pi. 11, f. 6), appears to be a true Pseudo- 

 grapsus. 



| Faun. Japon., p. 34. 



Brachynotes is the name of another genus by De Haan, based on a Mediterranean 

 species described by Risso, Hist. Nat. de l'Eur. Merid., v. 13. The male abdomen is 

 but four-jointed, the female seven-jointed; second and third joints of the outer maxil- 

 lipeds of equal length, and the third truncate at either extremity. 



§ Faun. Japon., p. 32. — Yaruna of Edwards, Crust., ii. 94. 



|| In part, Goniopsis of De Haan, Faun. Japon., p. 33, and Pachygrapsus of Randall, 

 J. Acad. Nat. Sci. Philad., viii. 126. 



f MS. Mus. Brit.; the genus is recognised in Bowdich's "Madeira and Porto Santo,"' 

 p. 151; and more lately in Bell's Brit. Crust., p. 133. — DFautiloyrapsm of Edwards, 

 Crust., ii. 89. 



** Grapms (subgenus) of De Haan, Faun. Japon., p. 31; Cyclograpsus, in part of 

 Edwards, Crust., ii. 77. 



