CRAYFISHES. 387 
were pointed out in my Revision, p. 64. It may be well in our present more 
advanced knowledge of the C. barionii group to recognize C. montanus as a 
geographical race or subspecies of C. bartonit. 
In the collection of the Academy of Natural Sciences of Philadelphia there 
is a young male, labelled ‘‘ James River, Va., C’. montanus?”’ which is very prob- 
ably a cotype or paratype of Girard’s Cambarus montanus. With regard to this 
and other quasi types of Girard’s species in the Philadelphia Academy, the reader 
is referred to Hagen’s Monograph, p. 7, and my Revision, p. 11. 
I have examined specimens of C. bartonti montanus, nearly or quite typical, 
from the following localities: —Vrreinta: Wytheville, Wythe Co. (U.S. N. M., No. 
13,966, M. C. Z., No. 3,888); Rocky Gap, Bland Co. (U.S. N. M., No. 28,568.) 
West Virani: Horsepen Creek, [Mingo Co.?] (U.S. N. M. No. 28,555); Madam 
Creek, tributary of New River, opposite Hinton, Summers Co. (U. 8. N. M., 
No. 28,556, M. C. Z., No. 7,398); Bergen’s Springs, 12 miles above Hinton (U.S. 
N. M., No. 28,566); Delashmeet Creek, Kegley, Mercer Co. (U.S. N. M.,-No. 
28,610); Bluestone River, just above its mouth, Mercer Co. (U.S. N. M., No. 
28,570); mouth of Delashmeet Creek, Bluestone River, Mercer Co. (U.S. N. M., 
No. 28,565); Bluestone River, Abb’s Valley (U. S. N. M., No. 28,569); Hast 
River, Mercer Co. (U.S. N. M.); Rich Creek, Spanishburg, Mercer Co. (U. 8. 
N. M.); Barrenche Creek, Perrysville, McDowell Co. (U.S. N. M., No. 28,573) ; 
War Creek, McDowell Co. (U. S. N. M., Nos. 28,564, 28,580); Guyandotte 
River, Baileysville, Wyoming Co. (U.S. N. M., Nos. 28,562, 28,578, 28 #). 
Isolated localities from which I have seen specimens of C. bartonii very 
closely resembling the form montanus in the breadth and punctation of the areola 
are: Alum Creek, Franklin Co., Ohio, R. C. Osburn and E. B. Williamson (U.S. 
N. M., No. 22,351), Cincinnati, Ohio (M. C. Z., No. 288), creek at Knoxville, 
Tenn., Walter Faxon (M. C. Z., No. 3,477). From Cogar’s Mill, Elk River, 
Kanawha Co., W. Va., I have seen an interesting lot of specimens that combine 
the characters of C. b. montanus and C. b. longulus, the rostrum and chela of 
montanus going with the reduced sub-orbital angle of longulus. These specimens 
are in the U. 8. National Museum, No. 23,990, and in the Museum of Compara- 
tive Zoélogy, No. 7,401. 
CAMBARUS BARTONIL ROBUSTUS (Girard). 
Plate 3. 
From Cambarus bartonii montanus the passage is easy to C. b. robustus, in 
which form the rostrum is longer and more tapering, the areola rather longer 
and narrower and the outer margin of the hand more costate, an emphatic de- 
