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U.S. NATIONAL RIUSEUM BULLETIN 292 



twice as long as wide, smooth and bare; carpus nearly twice as long 

 as palm and slightly longer than merus. Third pereiopod with propodus 

 more than three and one-half times as long as dactyl. A small species, 

 maximum postorbital carapace length about 9 mm. 



Habitat. — Subterranean fresh water. 



Distribution. — Known only from the type-locality, an underground 

 stream in Provincia de Oriente, Cuba. 



Figure 27. — Troglocuhanus giharensis, male holotype (carapace length 6.8 mm) from 

 Termino de Gibara, Oriente Province, Cuba (from Chace, 1943). 



27. Troglocuhanus inermis (Chace) 

 Figure 28d 



Palaemonetes calcis Rathbun, 1912 [part], p. 451, pi. 1: fig. 4. 

 Palaanonetes inermis Chace, 1943, p. 26, pi. 6 [type-locality: cave between Mad- 

 ruga and Aguacate, Provincia de La Habana, Cuba]. 

 Troglocuhanus inermis. — Holthuis, 1950b, p. 11; 1952, p. 150, pi. 39. 



Diagnosis. — Carapace unarmed, without antennal, branchiostegal, or 

 hepatic spines. Rostrum reaching nearly as far as end of antennular 

 peduncle, both margins subparallel proximally, strongly convex dis- 

 tally; unarmed or with small dorsal tooth near distal end. Eyes 

 reduced, cornea without pigment. Second pereiopods subequal, slender 

 fingers about three times as long as palm, meeting throughout their 

 length, smooth and bare, without teeth on opposable margins; palm 

 subquadr angular, little longer than wide, smooth and bare; carpus about 

 as long as fingers and half of palm and approximately as long as merus. 



