1880.] NATURAL SCIENCES OF PHILADELPHIA. 139 



except a short curved one near the occludent margin ; thumb ex- 

 ternally margined below, its occludent margin forming a promi- 

 nence at the distal third ; dactylus with the margins nearly 

 parallel, the occludent one with scattered larger tubercles, tip 

 acute. 



Australia ! (Dr. T. B. Wilson) Phila. Acad. Luzon (Petiver) Phil- 

 ippines (White). 



4. Gelasimus styliferus, Edw. PI. ix, f. 4. 



Gelasimus platydactylus Edw., 111. Edit. Regne Animal, Crustaces, pi. 

 xviii, f , 1 a (without date) . Gelasimus styliferus Edw., Am. Sci. Nat. 

 Ill, xviii, p. 145, pi. iii, f. 3, (1852) ; Smith, Trans. Conn. Acad., ii, 

 p. 118, (1870). 



A species very near G. platydacii/lus, but liaving the marginal 



crest of the arm less developed and the eye stalks terminated by 



a small stylet as in the Ocypodaa (Edw.). Is possibly but a variety 



of heterochelos. 



Ouayaquil, Equador, (Edw.). 



5. Gelasimus heterophthalmus Smith. PI. is, f. 5. 



Oelasimus heterophthalmus Smith, Trans. Conn. Acad, ii, p. 116, pi. 

 11, f. 6, pi. iii, f. 1 (1870) ; Rep. Peab. Acad. Sci. iii, p. 91 (1871). 



Meros of larger cheliped with posterior margin rounded, the 

 inferior crenulate, superior with a broad ci'cst, carpus with the 

 upper outer surface granulate, elsewhere smooth. Hand inflated, 

 basal portion of palm externall}' granulate, thumb punctate, with 

 an external elevated ridge. Inner surface of palm smooth, with 

 two rows of tubercles much as in G. heterocheles. Fingers com- 

 pressed, the thumb with a deep emargination at the base and a prom- 

 inent tubercle just beyond, occludent margin of finger nearly 

 straight. 



Oulf of Fonseca, West Coast of Nicaragua .' McNiel (Smith's types 

 in Peab. Acad.). 



This species is closely allied to G. heterocheles. When I exam- 

 ined the specimens, the prolongations of the ocular peduncles 

 described by Prof Smith were broken off. 



6. Gelasimus heteropleurus Smith. PI. is, f. 6. 



Gelasimus heteropleiirus Smith, Trans. Conn. Acad., ii, p. 118, pi ii, f. 

 7, pi. iii, f. 2 (1870) ; Rep. Peab. Acad., iii, p. 71 (1871). 



Carapax but slightly convex, one side produced laterally. One 

 eye with a stylet about as long as the cornea, similar to those 

 found in certain Ocypodse. Meros of larger cheliped with the 



