DECAPOD CRUSTACEANS OF THE WEST INDIES 111 



scale, dorsal margin shallowly sinuous, tip directed slightly upward; 

 armed with 7 to 10 dorsal and 5 or 6 ventral teeth; posterior tooth of 

 dorsal series placed on carapace behind level of orbital margin, 

 distal two teeth subapical, separated from posterior group of evenly 

 spaced teeth by unarmed interval amounting to about one-third of 

 rostral length. Eyes large, cornea well pigmented. Second pereiopods 

 of adult male subequal, very slender, fingers about tlu-ee-fourths 

 as long as palm, meeting throughout their length, smooth and bare, 

 with single small tooth near proximal end of each opposable margin; 

 palm subcylindrical, more than three and one-half times as long as 

 wide, smooth and bare; carpus longer than either chela or merus. 

 Third pereiopod with propodus slightly more than twice as long as 

 dactyl. A medium-sized species, maximum postorbital carapace 

 length about 15 mm. 



Habitat. — Fresh, occasionally brackish water. 



Distribution. — Republics of Costa Rica and Venezuela to Brazil 

 (Trinidad). 



Genus Palaemon 



23. Palaemon (Palaemon) pandaliformis (Stimpson) 



Figures 26, 28a 



Leander pandaliformis Stimpson, 1871, p. 130 [type-locality: Barbados or Trinidad]. 

 Leander Potitinga MiiUer, 1892, p. 181 [type-locality: Blumenau, Estado de Santa 



Catarina, Brazil]. 

 Palaemon {Leander) ■pandaliformis. — Thallwitz, 1892, p. 12. 

 Palaemon {Leander) potitinga. — Thallwitz, 1892, p. 12. 

 Leander petitinga. — Rankin, 1898, p. 246. 

 Palaemonetes cubensis Hay, 1903, p. 433, fig. 3 [type-locality: "Palacio" (probably 



Los Palacios, Provincia de Pinar del Rio), Cuba]. 

 Leander cubensis. — Kemp, 1925, p. 291. 

 Palaemon cubensis. — Schmitt, 1935, p. 160. 

 Palaemon {Palaemon) pandaliformis. — Holthuis, 1950b, p. 7; 1952, p. 187, pi. 46: 



figs, g-1.— Alves Coelho, 1966, pp. 69-71. 



Diagnosis. — Carapace with antennal and branchiostegal spines, 

 without hepatic spine. Rostrum reaching beyond end of antennal 

 scale, dorsal margin nearly straight or slightly concave, tip directed 

 upward; armed with 6 to 10 dorsal and 5 to 9 ventral teeth; posterior 

 tooth of dorsal series small, placed on carapace behind level of orbital 

 margin, distal 1 to 3 teeth subapical, separated from posterior group 

 of rather evenly spaced teeth by unarmed interval amounting to 

 about one-third of rostral length. Eyes large, cornea well pigmented. 

 Second pereiopods of adult male subequal, very slender, fingers two- 

 thhds to three-fifths as long as palm, meeting throughout their length, 

 smooth and bare, with single small tooth at end of proximal thu'd of 

 opposable margin of dactyl, none on immovable finger; palm sub- 



