384 CRAYFISHES. ° 
Simonds’s Pond, Franklin Co. (M. C. Z.); Three-Mile Creek, Oswego, Oswego 
Co. (U.S. N. M.). Viremnta: Broad Run and Gap Run, Fauquier Co. (U. 
S. N. M.); Orkney Springs, Shenandoah Co. (U. 8. N. M.); Stony Man Mt., 
3000 ft., Madison Co. (U.S. N. M.); Peaks of Otter, 2600 ft., Bedford Co. 
(U.S. N.M.). West Virreinta: West Branch of Potomac River, 5 miles west 
of Circleville, Pendleton Co. (U. S. N. M.); Rich Creek, Spanishburg, Mercer 
Co. (U. S. N. M.); Trubie’s Run, 7, miles above Buckhannon, Upshur Co. 
(U.S. N. M.). Norra Carortina: Looking-Glass Creek, Transylvania Co., 
3300 ft. (U. S. N. M.); near Montreat, Buncombe Co. (U.S. N. M.). Trn- 
NESSEE: 7 miles northwest of Chattanooga, Hamilton Co. (U. 8. N. M.); 
Little River, a tributary of the Tennessee River at Cade’s Cave (U. 8. N. M.). 
The Barton’s Crayfish of Aroostook County in Northern Maine (of which 
there is a large collection in the United States National Museum from the 
Allegash River a little below Chamberlain Lake, Churchill Lake, Eagle or 
Heron Lake, Crosslake Throughfare, and Bean Lake, St. Francis River) is a 
small, clean form that in these clear, cool, northern waters shows a slight 
differentiation from the typical C. bartonit from the Middle States. The 
rostrum is more strongly decurved and the fingers are narrower and more cylin- 
drical and gape widely at the base. The differences between this form and the 
type nevertheless do not seem to be great enough or constant enough to warrant 
a subspecifie separation. 
CAMBARUS BARTONII CARINIROSTRIS Hay MS., subsp. nov. 
“Rostrum of medium length, very broad, nearly plane or slightly excavated 
above and with a more or less distinct, median, longitudinal carina; acumen 
short, broad, with concave sides, its tip strongly upturned. Carapace with a 
spinulose angle below the eye; branchiostegian spine obsolescent; areola of 
moderate width. Telson bi- or tri-spinose on each side. Antennae, when 
extended backward, reaching beyond the middle of the abdomen. Chelipeds 
stout and heavy, chelae broad and strong, heavily punctate above and below; 
inner margin of hand obscurely serrato-denticulate; fingers usually gaping at 
the base, strong down curved, pitted in lines, upper surface heavily ribbed. 
Otherwise essentially the same as typical C. bartond. 
“This form, which I regard as a well-marked subspecies, is in typical ex- 
amples very like C. bartonii in general, but different in the following regards :— 
the carapace is a little more cylindrical, the rostrum broader and flatter, and 
