22, A REVISION OF THE ASTACIDAi. 
_ 
are the same in all essential regards, and specimens intermediate in the form 
of the hands, rostrum, and antennal scale are frequently met with. 
Two dry male specimens in the Museum of the Academy of Natural Sci- 
ences of Philadelphia, from Kemper Co., Miss., labelled “ C. acudissimus 2” are 
probably types of the species described under that name by Girard. They 
appear to be young specimens of Q, acutus. 
The specimens of C. Blandingu, var. acuta, received from the Western 
States differ somewhat from those of the Southern States, as pointed out 
by Hagen on page 36 of the Monograph of the North American Astacide. 
They form a sub-variety designated by the letter A. 
Dr. Hagen considers Le Conte’s A. Blundingii to be his O. Lecontei. No 
type of Le Conte’s species is known, but the description and habitat (middle 
regions of Georgia and Carolina) fit Blandingi better than Leconter. 
Gibbes and Girard seem to have confounded this species with C. trogd- 
dytes. There is a specimen of C. troglodytes in the Museum of Comparative 
Zoilogy, sent by Gibbes with the label “ Asfacus Blanding’ Havl.,” and the 
localities given by him,* viz. “the low country of South Carolina,” and by 
Girard, viz. “Summerville, 8. C.,” refer to C. troglodytes. 
From Montgomery, Ala., comes a form which agrees with C. Blandingii in 
all respects except the male sexual appendages, which approach those of 
CO. Lecontet in the curvature of the two anterior apical teeth. The posterior 
apical tooth is straight, as in OC. Blundingi’. Tn many of the larger specimens 
there are three spines on each side of the telson, This may perhaps prove 
to be a distinct species. 
Two female specimens in the Museum of Comparative Zodlogy, from 
Dallas, Texas, agree well with C. Blandingii, but it is difficult to determine 
them positively in the absence of male specimens. They were collected by 
J. Boll, and are labelled “ Burrowing Crabs.” 
In specimens of var. acuta, subvar. A, from the West, that have not lain 
long in alcohol, the rostrum is red (in some specimens only a pair of red 
blotches at the base), and there appears a good deal of red color on the 
dorsal side of the abdominal segments and the basal segment of the telson 
and swimmerets. Living specimens of C. Blandingii collected by me near 
Trenton, N. J., are of a dull greenish brown, whitish beneath and on the 
lower part of the carapace, with a dark-greenish longitudinal stripe on each 
* On the Careinological Collections of the Cabinets of Natural History in the United States. Proc. 
Amer. Assoc. Ady. Sei., pp. 167-201, 1850. 
