CRAYFISHES. 3605 
a male, dried and transfixed with a pin, the rostrum 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. 
Cambarus cubensis rivalis Fax., Bull. Mus. Comp. Zodél., 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 consobrinus 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, 6 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. 7,406), two males of the second form 
and three females, were caught by Dr. Thomas Barbour in a mountain stream 
near San Diego de los Banos, in the Province of Pinar del Rio, Feb., 1912. There 
are also specimens in the U. 8. 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: — Texas: Sourlake, Hardin Co. (U.S. N. M.). ARKANSAS: 
Saline R., Benton, Saline Co. (U. S. N. M.). Oxtanoma: Mount Scott, 
Comanche Co. (U. 8. N. M.). 
Under the name Cambarus gallinus this species has been recorded by Messrs. 
T. D. A. Cockerell and Wilmath Porter (Proce. Acad. Nat. Sei. 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. 
