120 



U.S. NATIONAL MUSEUM BULLETIN 2 92 



Habitat. — Mountain streams. 



Distribution.— Provincia de Pinar del Rio, Cuba. 



33. Procambarus niveus Hobbs and Villalobos 



Figure 31d 



Procambarus niveus Hobbs and Villalobos, 1964, p. 342, pis. 5-6 [type-locality: 

 Cuevas de Santo Tomds, Sierra de los Organos, near Ponce, Provincia de 

 Pinar del Rfo, Cuba]. 



Diagnosis. — Body without pigment. Areola 3.8-4.0 times longer 

 than broad and constituting 32-33 percent of entire length of ceph- 

 alo thorax. Eyes small. First pleopod of first form male with broadly 

 rounded shoulder on anterodistal surface; posteromesial surface not 

 strongly convex (as compared with P. cubensis cubensis and P. 

 cubensis rivalis); distolateral "tooth'' {caudal process) broad, low, and 

 rounded. A medium-sized species, maximum postorbital carapace 

 length about 20 mm. 



Habitat. — Subterranean fresh water. 



Distribution. — Known only from the type-locality in Provincia 

 de Pinar del Rio, Cuba. 



Figure 31. — Left first pleopods in lateral view of first form males: a, Procambarus atkin- 

 soni; b, P. cubensis cubensis; c, P. cubensis rivalis; d, P. niveus. (Modified from Hobbs 

 and Villalobos, 1963.) 



