GRAPSOIDEA. 379 



G. 3. XENOPHTHALMUS, White.* Corpus obesum, fronte incisionibus duabus pro- 



fundis oculos gerentibus instructo. 

 G. 4. XANTHASIA, WMte.^ Corpus depressum, supra fere planum margineque 



elevato utrinque instructum, fronte paulo producto. Oculi normales. 



6. Pedes 4ti longiores et multo validiores. 

 G. 5. PINNIXA, White.'l Corpus portentose' transversum. 



2. Oculi sat remoti. Fossce antennales septo latiusculo sejunctce. Articulut maxillipedii exlerni 

 Zdus fere dimidii Zlii longitudine. 



G. 6. PINNOTHERELIA, Lucas. Pedes 8 postici sat graciles, subaequi. Corpus 

 suborbiculare. 



2. HYMENICIN^E. Corpus sgepius parce rostratum, depressum. 

 Articulus maxillipedis extern! 2dus dimidio 3tii major. 



G. 1. HYMENOSOMA, Leach. Carapax suborbiculatus, angulo extra-orbitali acuto. 



Frons angustissimus, non lobatus, oculis valde approximatis. 

 G. 2. HALICARCINUS, TFA(Ve.|| Carapax suborbiculatus, angulo extra-orbitali nullo. 



Frons tridentatus, antennis internis inter dentes se porrigentibus, oculis remotio- 



ribus. Articulus maxillipedis externi 3tius 2do paulo major. 

 G. 3. HYMENICUS, Dana.^ Carapax suborbiculatus, angulo extra-orbitali nullo 



aut parvulo. Frons productus, simplex aut lobatus, antenuarum basin celans, 



oculis remotioribus. Articulus maxillipedis externi 3tius 2do paulo major. 



Pedes gracillimi. 

 G. 4. ELAMENA, Edw. Carapax subtriangulatus, paulo oblongus, paulo rostratus, 



fronte antennas internas celante. Articulus maxillipedis externi 3tius 2do minor. 



SUBFAMILY I. PINNOTHERIN^E. 



1 



The species constituting the subfamily Pinnotheringe are usually 



* White, Ann. Mag. Nat. Hist., xviii. 177, and Voy. of Samarang, p. 63. The genus 

 Fabia forms a transition from Pinnothera to Xenophthalmus ; it includes the P. 

 chilensis. 



f Ann. Mag. Nat. Hist., xviii. 176. 



J Ann. Mag. Nat. Hist., xviii. 177. Includes Say's Finn, cylindricum, Jour. Acad. 

 Nat. Sci. Philad., i. 452. 



Crust, of D'Orbigny's S. Amer., p. 24. The genus forms a transition to the Ge- 

 carcinidae. 



|| Ann. Mag. Nat. Hist., xviii. 178. 



Tf The genus Hymenosoma belongs to the Cape of Good Hope ; Ilalicarcinus to the 

 extremity of South America, and Hymenicus to New Zealand. 



