eo” | PROCEEDINGS OF THE NATIONAL MUSEUM. 623 
Cambarus longulus Gir. 
Cambarus longulus Girard, Proc. Acad. Nat. Sci. Phila., v1, 1852, p. 90. 
Cambarus bartonii (part.)? Hagen, Mon. N. A. Aeaides: pp. 78, 79,1870. Faxon, 
Proc. Amer. Acad. Arts and Sci., xx, 1884, p. 143. IJd., Rev. Astacida, pt. I, 
p. 66, 1885. 
Waynesborough, Virginia; Lick Run, James River, Virginia; North 
River, Lexington, Virginia; Wytheville, Virginia; South Fork of Hol- 
ston River, near Marion, Virginia; Spring Creek, Hot Springs, North 
Carolina; Watauga River, Elizabethton, Tennessee. Col. M. McDon- 
ald and Prof. D. S. Jordan (U. 8. F. C.). Specimens in the Museum 
of Comparative Zodlogy from Bath County, Virginia, from near White 
Sulphur Springs, West Virginia, and from Knoxville, Tennessee, prob- 
ably belong to this species, but they are too young to determine with 
certainty. 
It is only after examining the large number of specimens (over one 
hundred, including females and both forms of the male), collected by 
Colonel McDonald and Professor Jordan, that Iam prepared to restore 
this form to the full rank of a species. When the Monograph of the 
North American Astacide was written, Dr. Hagen had seen but one 
specimen (Girard’s type), and he inclined to regard it as a deformed 
individual of C. bartonii. His description of the type specimen shows 
that it is the same as the form now under consideratiou. Compared 
with the typical C. bartonii from eastern Pennsylvania, the rostrum of 
C. longulus is much longer and narrower, deeply excavated above, the 
sides thickened, somewhat concave and convergent, with longer acu- 
men; the antenne scale is produced into a longer spine; the carapace 
is more finely punctated, the hepatic and branchial areas smoother, 
the suborbital angle commonly but little or not at all developed; the 
chelz are smoother and broader; the fingers more cylindrical, without 
the longitudinal rid ge along the upper face of the outer finger, widely 
separated at the base, the outer one bearded within at the base and 
along the margin; the basal spine of the inner margin of the carpus is 
absent. The beard on the hand is densest in small specimens, being 
more or less removed by attrition in old individuals. In specimens 
from Marion, Virginia, Spring Creek, North Carolina, and Elizabethton, 
Tennessee, the suborbital angle is prominent, as in C. bartonii. In C. 
bartonii longirostris Fax. (Rev. Astacide, p. 64), the rostrum is not so 
much contracted, its margins not so much thickened as in C. longulus, 
in fact the rostram of spinirostr ig’ has about the same shape as that of 
C. bartonii robustus; the sides of the antennal scale are straight and 
nearly parallel to one another; the fingers are not separated more than 
in the typical C. bartonii and not so densely bearded as in C. longulus. 
It connects with the typical bartonii through robustus. But I have 
hardly enough material before me to give spinirostris a firm place as a 
subspecies. Jowairestre 
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