28 A REVISION OF THE ASTACIDA. 
Both Girard and Gibbes (Proc. Amer. Assoc. Adv. Sci., 3d Meeting) 
appear to have confounded this species with C. Blanding Harlan. A female 
C. troglodgtes in the Museam of Comparative Zodlogy, from South Carolina, 
is labelled “Astacus Blandingi Har).” by Professor Gibbes. The localities for 
O. Blandingii (Summerville, S. C., and low country of South Carolina) given 
by these authors undoubtedly appertain to C. droglodytes. 
Slight differences between specimens from Georgia and Charleston, 8. C., 
are pointed out by Hagen (pp. 42, 43). In one of the Georgia specimens the 
telson is quadrispinose. In specimens from near Columbia, 8. C., the basal 
segment of the telson is bispinose on each side. 
The rostrum is sometimes slightly carimated near the tip. 
I doubt the accuracy of the locality label of the specimen of this species 
in the Museum of Comparative Zodlogy numbered 197. It was taken from 
a jar containing C. Diogenes from Lawn Ridge, Hl. No other specimens have 
been reported from the West. 
The specimen in the Museum of Comparative Zodlogy (No. 5557) labelled 
Rocky River, Olmsted, Ohio, determined as C. troglodytes by Hagen (p. 45), 
seems to be C. Clarkii (see p. 27). 
According to colored drawings of this species made from living specimens 
by J. Burkhardt at Charleston, in 1853, the body is brownish red, the tuber- 
cles on the chelz bright red, legs red below. 
Dr. Le Conte states that in Lower Georgia this species is found in the rice- 
fields, where it makes holes four inches deep, and in ditches (A. fossarwi). 
Specimens from Richmond Co., neighborhood of Augusta, Ga., received 
recently from Col. Charles C. Jones, Jr. (Cat. No. 3550), are noteworthy in 
that the male appendages, especially of the second form, approach closely 
in their form those of @. Clark. In the shape of the rostrum and other 
respects these specimens agree with C. troglodytes. The telson is trispinose 
on each side. In the light of these specimens, I am inclined to suspect 
that further explorations will break down the specific distinctions between 
C. troglodytes and C. Clarkii. But my material does not represent a wide 
enough geographical range to warrant a definite opinion. 
