Zoology. 287 



Fam. III. GRAPSID^. 



■ 4 



Oculi tertia parte latltudinis carapacis breviores. Carapax subqua- 

 dratus, ssepius depressns, lateribus aut rectis nut arcuatis. Antennae 

 internte transversse. Articulus abdominis viaris 2dus sterno postico 

 sicpius vix angusiior. Articulus maxillipedis exierni 3lius sive inorna- 

 tus sive costa obliqua ornatus. Palatum linea elevala vise efferentis 

 liniite instructum. 



1. GRAPSIN-iE. — Antennse interna^ fronte teclae. Articulus maxilli- 

 pedis externi 3tius costa obliqua in 2dum producla non notatas. 



1. ^fax'itUpedes externi viz hiantcs, 



G 1. PsECJDOGRAPsus, Ediv. — Arliciilus maxillipedis externi Stius 

 orbiculalo-cordaius, aut subquadratus, 2dQ brevier. Frons 

 dimidio latitudinis carapacis vix brevier- Carapax lateribus 

 arcuatus. 



G. 2. Eriocheir, De-H".* — Articulus maxillipedis externi 3tius uti 

 in Psetidograpso, Frons dimidio latitudinis carapacis niulto bre- 

 vior. Carapax subpolygonaius, 



G. 3, Platynotus, De HA — Articulus maxillipedis exierni 3tiu9 

 2do lon^Tior, margine poslico valde obliquo. 



G. 4. Trichopus, De H,^ — Articulus maxillipedis exierni 3tiu9 

 latior quam longior, extus dilatalus. Pedum articuli 5ius 

 6tusque posticorum compressi denseque ciliati, 



2. MaxiUipedes externi rliomboidice Mantes. 



G. 5. Grapsits, Lanik. — Carapax transversim lineolatus, lateribus 



plus minnsve arcuatis. Frons dimidio latitudinis carapacis bre- 

 vior. Antennae extern^e juxta frontis latera oblique exsertse. 



Tarsi spinulis armati. 



^ — Carapax transversim lineolatus. 



lateribus rectis, postice sa^pe conver^entibus. Frons dimidio 

 latitudinis carapacis longior. Antennse externcc sub frontis mar- 

 gine ssepius exserlae. Tarsi spinulis armati. 



Faun, Japon., p. 32, 59.— The genus Utlca of White, (Ann. 'Mug. Nat Hist., xx, 

 206, and Crust, yfoj. Samarang, 52, pi. 13, %. 6,) appears to Lave the essrcntial char- 

 acteristics of Eriocheir, and like Eriocheir differs but Jittle from Pseudograpsus. 

 The front is narrow, the form subpolygonal, and it lives like E. Japonicus, in fresh- 

 ■^ater. The bushy hair on the Iiand of the Japan species is not necessarily a generic 

 character. The name Eriocheir is therefore unfortunate, and it would be better for 

 th^science to substitute the name given by White. 



The B. penicillatus of De Haan, (p. 60. pL 11, f- 6,) appears to be a true Fseu- 

 aograpsus. 



i^ Faun. Jap., p. u, 



based 



The male 



^IJ^i^ei^gth, and the 3d truncate at either extremity. 



Eaun. Jap., p. 32.— raruna of Edwards, Crust, li, 94. ^ r^ , „ 



In part, Goniopds of De Haan, F. Jap., p. 33, and Pachygrap-ms of Randall, 

 Acad. Nat. ScL Pliikd.. viii. 1-26. 



•ORACH vxoTus is the name of another genus by De Haan bas. 

 species described by Risso. Hist. Nut. de TEur. Merid., v, 13. 



is out J-irtlnf-.-J *i,, r t_ H •_ • i. I aj A oj ;.,:.,f^, ^r fVij 



