270 



STALK-EYED CRUSTACEA 



G. niaracoani. 



SvNorsis OF THE Species. 



A. Front very narrow between the orbits. 



a. Movable finger of larger hand 

 terminates in a sharp point. / 



1. Movable finger of larger hand 

 broader near extremity than at base. 

 — {G. viaracoani^ 



2. Movable finger of larger hand, con- 

 tracts from base to point. — {G. Jietero- 

 cheies.) 



B. Front broad betw^een the orbits. 



b. Carapace narrowed behind, ^.——y-.^.,^^^ 



3. A ridge on inner surface of palm ^^^HI^ ~~P 

 of larger hand. — (G.vocator?) „ 



c. Carapace nearly quadrate. 



4. No ridge on inner surface of palm of ^3irx "j 



G. pugellator. 



G. he/erocheles. 



larger hand. — {G. pugellator^ 



I. Gelasimus maracoani. 



Gelasiiitus maracoani .... L.atreille, Desmarest, 



Milne Edwards, 



Gelasimus ariiiatiis . . 

 Goiioplax jnaracoajii . 

 Ocypoda maracoani 

 Ocypoda heterochelcs . 

 Scissor crab (local nanie\ 



Dana, White. 

 Smith. 

 Lamarck. 

 Latreille. 

 Bosc. 

 Berbice. 



Regions distinct, each branchial region ornamented 

 with a longitudinal ridge, from which branch off smaller 

 ones. Of the first pair of legs the leg having the largest 

 hand has on its third joint a prominent tooth below; the 

 fourth joint has a tooth on its posterior margin at the 



