332 CRUSTACEA. 



G. 2. HETEROGRAPSUS, Lucas.* Pseudograpso similis. Carapacis latera recta 

 postice convergentia, ac in Sesarma. 



G. 3. ERIOCHEIR, De H.^ Articulus maxillipedis extern! Stius ac in Pseudo- 

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

 gonatus. 



G. 4. PLATYNOTUS, DeII.\ Articulus maxillipedis externi Stius 2do longior, mar- 

 gine postico valde obliquo. 



Gr. 5. TRICHOPUS, De _ff. Articulus maxillipedis externi Stius latior quam lon- 

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

 que ciliati. 



2. Maxillipedes externi rhomboidice Mantes. 



Gr. 6. GR'APSUS, Lamk. Carapax transversim lineolatus, lateribus plus minusve 

 arcuatis. Frons dimidio latitudinis carapacis brevior. Antennae externse juxta 

 frontis latera oblique exsertae. Tarsi spinulis armati. 



G. 7. GONIOGRAPSTJS, Z>arm.|| Carapax transversim lineolatus, lateribus rectis, 

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

 tennae externae sub frontis margine saspius exsertas. Tarsi spinulis armati. 



G. 8. PLANES, Leach.\ Carapax non lineolatus, laevis, fere quadratus, parce ob- 

 longus. Frons rectus. Articulus maxillipedis externi Stius latior quam longus, 

 cordatus. Tarsi spinulis armati. 



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

 minusve arcuatis. Frons rectus aut rectiusculus, antennis internis transversis. 

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



G. 10. CYRTOGRAPSUS, Dana. Carapax gibbosus, subhexagonus non lineolatus. 



* Lucas, Expl. de 1'Alger, pi. 2, f. 4. 



f Faun. Japon., p. 32, 59. Utica of White (Ann. Mag. Nat. Hist., xx. 206, and 

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



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

 grapsus. 



J Faun. Japon., p. 34. 



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

 species described by Kisso, Hist. Nat. de 1'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. Varuna 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. 



T[ 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. Nautilograpsus of Edwards, 

 Crust., ii. 89. 



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

 Edwards, Crust., ii. 77. 



