112 



U.S. NATIONAL MUSEUM BULLETEST 2 92 



cylindrical, about four times as long as wide, smooth and bare; 

 carpus more than one and one-half times as long as either chela or merus. 

 Thii'd pereiopod with propodus more than twice as long as dactyl. 

 A small species, maximum postorbital carapace length about 7 mm. 



Habitat. — Fresh and brackish water. 



Distribution. — West Indies and Republic of Guatemala to Estado 

 de Santa Catarina, Brazil (Cuba, Hispaniola, Puerto Rico, Saint 

 Croix, Barbados). 



Figure 26.- — Palaemon {Palaemon) pandaliformis, male (carapace length 6.8 mm) from 

 East Luquillo, Puerto Rico (D. S. Erdman). 



Genus Troglocubanus 



24. Troglocubanus calcis (Rathbun) 



Figure 28b 



Palaemonetes calcis Rathbun, 1912 [part], p. 451, pi. 1: figs. 1-3, 5 [type-locality: 



cave between Madruga and Aguacate, Provincia de La Habana, Cuba]. 

 Troglocubanus calcis — Holthuis, 1950b, p. 11; 1952, p. 144, pi. 36. 



Diagnosis. — Carapace with antenna! spine arising from anterior 

 margin, without branchiostegal or hepatic spines. Rostrum reaching 

 beyond end of antennular peduncle, but not to end of antenna! scale, 

 tapering gradually to terminal point, slightly convex dorsally, straight 

 or slightly concave ventrally; armed with single dorsal tooth placed 

 on carapace slightly behind level of orbital margin. Eyes reduced, 

 cornea without pigment. Second pereiopods subequal, slender, fingers 

 about one and one-half times as long as palm, meeting throughout 

 their length, smooth and bare, mth single small tooth in extreme 

 proximal part of opposable margin of dactyl, mimovable finger un- 

 armed; palm subcylindrical, swoUen in proximal two-thirds, about 

 two and one-half to three times as long as wide, smooth and bare; 

 carpus distinctly longer than palm and slightly longer than merus. 



