CRAYFISHES. 391 
CAMBARUS BARTONIT ASPERIMANUS, subsp. nov. 
Even as these pages are going to press, two specimens of a peculiar, 
new race of C. bartonii are sent to me from the U. 8. National Museum,— males 
of the first form, collected by Messrs. P. C. Standley and H. C. Bolman in 
Flat Creek, near Montreat, Buncombe Co., N. C., Sept. 1, 1913. C. bartonii 
bartonii was also collected at the same time and place. The new form is conspicu- 
ously different from any previously known race of C. bartonii in having scattered 
coarse setae upon the chelae, which are moreover deeply and coarsely pitted, 
with a tendency toward corrugation; the inner border of the propodus is fur- 
nished with a cristiform row of from five to seven teeth; the dorsal face of the 
carapace is extremely smooth and shows hardly a trace of the customary pits 
or impressed dots except a row along the margin of the rostrum; even on the 
areola the dots are scarcely visible without high magnification; finally, the ante- 
rior process of the epistoma is broadly truncate in front. 
Such are the diagnostic characters of this sub-species, which in other regards 
agrees pretty closely with typical C. bartonii. The hooks of the third segment 
of the third pair of legs are acute and attenuated at the tip. 
Length, 54 mm., carapace, 27 mm.; chela, 19mm. Type, U.S. N. M., No. 
47,375. 
CAMBARUS BARTONIT ACUMINATUS Faxon. 
Cambarus acuminatus Faxon, Proc. Amer. Acad., 1884, 20, p. 113. 
New localities:— Maryann: Northwest Branch, Hyattsville, Prince 
George’s Co. (U.S. N. M.); Indian Creek, Beltsville Prince George’s Co. (U.S. 
N. M.); NortH Carouina: Halifax, Halifax Co. (U.S. N. M.). 
As noted above under Cambarus bartonti robustus, specimens from Fredericks- 
burg, Va. (M. C. Z., Nos. 3,615, 3,797) approach closely to the form acuminatus 
and seem to exemplify a transition from robustus to acuminatus. 
CAMBARUS BARTONII LAEVIS, subsp. nov. 
This form of C. bartonii differs from the typical race in having the carapace 
smoother and less conspicuously punctated, the posterior section proportion- 
ately longer, being equal in length to the distance from the cervical groove to 
the root of the eye-stalks; this lengthening of the hind section of the carapace 
involves a long areola which is also not merely relatively but also absolutely 
