CRAYFISHES. 3G5 



a male, dried and transfixed with a pin, the roistrum is abnormal, the right margin 

 thereof being pared away toward the tip, carrying with it the right marginal 

 spine. This deformity was evidently present 'in the living specimen. On the 

 left side the marginal rostral tooth or spine is well developed, as are also the 

 spines at the anterior end of the post-ocular ridges. The lateral thoracic spines 

 too are fairly well marked. 



Cambarus cubensis rivalis Faxon. 



Camhanis cuhensis rivalis Fax., Bull. Mus. Comp. Zool., Oct., 1912, 54, p. 459. 



Differs from typical C. cubensis (which lives in the low country, near the sea- 

 level) in having a much shorter and broader areola, a shorter, broader, and 

 more heavily granulated claw; the sides of the rostrum, furthermore, are more 

 nearly parallel and they bear a pair of distinct lateral spines at the base of the 

 acumen. In so far as the rostrum is concerned this subspecies resembles C. c. 

 consobrinus, yet it differs from consohrinus by having a short and wide areola 

 and by the absence of lateral thoracic spines. The sexual parts are like those of 

 C. cubensis. 



Length of an ovigerous female, 44 mm., length of carapace, 21 mm., length 

 of areola, G mm., breadth of areola, 2 mm. 



This form is an inhabitant of the mountain streams of western Cuba. The 

 extent of its distribution remains to be determined by further exploration of the 

 island. The type specimens (M. C. Z. No. 7,40G), two males of the second form 

 and three females, were caught by Dr. Thomas Barbour in a mountain stream 

 near San Diego de los Baiios, in the Province of Pinar del Rio, Feb., 1912. There 

 are also specimens in the U. S. National Museum from the same place (Nos. 

 28,626, 28,627) and also from a mountain brook north of the town of Pinar del 

 Rio (Nos. 23,656, 23,657). 



Cambarus simulans Faxon. 



New localities:— TEXAfi: Sourlake, Hardin Co. (U. S. N. M.). Arkansas: 

 Saline R., Benton, SaUne Co. (U. S. N. M.). Oklahoma: Mount Scott, 

 Comanche Co. (U. S. N. M.). 



Under the name Cambarus gallinus this species has been recorded by Messrs. 

 T. D. A. Cockerell and Wihnath Porter (Proc. Acad. Nat. Sci. Phila., 1900, p. 

 434-435) from the Gallinas River at Las Vegas, San Miguel Co., in lakes at 

 Watrous, Mora Co., and from Roswell, Chaves Co., in the State of New Mexico. 



