STALK-EYED CRUSTACEA 277 



6. Carapace longer than broad. — {Nantilograpsiis^ 

 B. External maxillipedes withcmt rhomboidal gape. 



7. Fifth joint of the external maxillipedes articulating 

 at the inner angle of the fourth. Several teeth behind the 

 orbital angle. — {Enchyrograpsns.) KiNGSLEY. 



A . A rJiomboidal space between external niaxillipedcs : — 



I. Goniopsis. 



Goniopsis De Haan, Milne Edwards, 



Miers, Kingsley. 

 Gotiiograpsns (partj . . Dana. 



Carapace deep vertically, subquadrate, flat above, with 

 the cervical suture strongly defined, the lateral margins 

 armed with a single tooth behind the external orbital 

 angle, the anterior margin abruptly four lobed above the 

 front, which is broad and vertically deflexed. Orbits 

 rather large, with two hiatuses below, and with the interior 

 subocular lobe well developed. Eye-peduncles robust. 

 Internal antennae transversely plicated in the narrow, wide 

 fossettes. Basal joint of external antennae, broad and very 

 short, are completely excluded from the orbit by the 

 subocular orbital lobe. Epistome transverse. The ridges 

 of the endostome distinctly developed. The external 

 maxillipedes narrow, widely gaping, and remote from one 

 another at the base ; the fourth joint is nearly as long 

 as the third, widening to the distal extremity, which is 

 truncate ; the fifth joint articulates with it near its antero- 

 external angle ; the external appendage is very slender. 

 The first pair of legs, in the male, robust ; the fourth joint 

 is triangular in section, with the anterior margins dentated ; 

 the fifth joint and the hand are strongly granulated ; palm 

 somewhat compressed ; fingers but slightly excavated or 



