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CRAYFISHES. 369 
CAMBARUS CLARKII PAENINSULANUS, subsp. nov. 
The examples of Clark’s crayfish found in the peninsular portion of the 
State of Florida differ slightly, albeit constantly, from the typical Texas form 
in being smoother, in having a more tapering rostrum, and a shorter and broader 
antennal scale; there is moreover a slight difference in the shape of the tip of the 
male sexual appendages: the anterior terminal tooth being narrower and more 
acute than in the typical form in which this tooth is broader, more laminate and 
less acute at the tip; in the Floridan subspecies, too, the anterior half of the tel- 
son bears on each side from three to five spines, while in the typical C. clarkii 
there are but two spines on each side. 
Type: M. C. Z., No. 3,530, 1¢ f. Il. Three miles below Horse Landing, 
St. John’s River, Florida, Feb. 9, 1869, J. A. Allen. 
There are a good many specimens of this subspecies in the U. 8. National 
Museum collected by W. C. Kendall at Beecher’s Point, St. John’s River, Fla., 
in February and March, 1897, Nos. 28,587, 28,589. 
CAMBARUS WIEGMANNI Erichson. 
This species is still imperfectly known; Erichson’s type, which came from 
Mexico, is no longer extant; it was described as having hooks on both the third 
and fourth pairs of legs in the male. A female individual from Mexico, in the 
collection of the Academy of Natural Sciences of Philadelphia, was referred to 
this species by Dr. Hagen and myself, although with some doubt on account of 
the want of male specimens. In 1906 Dr. Ortmann (Proc. Washington Acad. 
Sci., 8, p. 15-19) described and assigned to this species a male belonging to the 
Philadelphia Academy, collected by Professor E. D. Cope in 1885 in Lake Xochi- 
milco, south of the City of Mexico, in the Federal District; in this specimen the 
legs of the third pair are furnished with a very small tubercle only, while those 
of the fourth pair are armed with a strongly developed hook. 
Four specimens, three male, one female, recently collected by Mr. W. M. 
Mann at San Miguel, State of Hidalgo, Mexico, and now in the Museum of 
Comparative Zoélogy, conform to Ortmann’s description of the Cope specimens, 
barring the fact that there is no vestige of even a tubercle on the third pair of 
legs of the male, the fourth pair alone being provided with hooks; these speci- 
mens may represent an undescribed species, but on account of the sad dearth of 
requisite material and the loss of the type of C. wiegmanni the elucidation of 
this question must needs be deferred to a later time. 
