| PROCEEDINGS OF THE NATIONAL MUSEUM. 629 
spine is much smaller, and the hand more inflated and triangular; the 
cephaiathorax is slenderer, the antenne longer; the male appendages 
are very similar to those of the typical form, but the free tips are a 
little-longer and slenderer. In the smoothness of the carapace and, 
to some extent,in the shape of the hand this form approaches C. sloanii 
Bundy, but the male organs and the annulus ventralis are very nearly 
like those of the typical C. affinis. I prefer to call it a western variety 
of C. affinis. The largest is 60™™ in length. The specimens from Lake 
Erie referred to C. affinis in my Revision are too small to determine 
with certainty. 
Cambarus propinquus Gir. 
Additional localities: Marshall, Michigan; St. Mary’s Lake, mouth 
of Battle Creek, Michigan; Kalamazoo River, Michigan, C. H. Boll- 
man (U.S. F. C.); Lafayette, Indiana, H. L. Osborn (M. C. Z.). 
Cambarus neglectus Fax. 
Cambarus neglectus Faxon, Bull. Washburn Coll. Lab. Nat. Hist., Topeka, Kan- 
sas, Vol. 1, 1885, p. 142. 
Male, form i.—Rostrum broad, slightly excavated, with a median 
longitudinal carina toward the apex; sides nearly parallel from the 
base to the lateral spines, which are very small and of a brown color ; 
acumen of moderate length. Post-orbital ridges with very small an- 
terior spines (sometimes none). Carapace oval, flattened above, punc- 
tate, lightly granulate on the sides, lateral spine minute or obsolete 
antero-lateral border angulated below the eye; anterior segment equals, 
at the most, twice the length of the posterior segment; areola of mod- 
erate width. Abdomen longer than the cephalothorax ; basal segment 
of the telson bi-spinous on each side of the posterior margin. An- 
tenne shorter than the body; lamina as long as the rostrum, broadest 
toward the distal end, apical spine of moderate length. Anterior pro- 
cess of the epistoma long, subtruncate. Third maxillipeds hairy within, 
naked below. Chelipeds short; chela broad, punctate above and 
below, inner margin furnished with a double row of depressed tuber- 
cles; fingers of moderate length, more or less gaping at the base, with 
a row of round tubercles on their opposed edges, outer margin of the 
movable finger also furnished with low tubercles; carpus broad, pune- 
tate above, with a strong median spine on the internal side and a small 
one near the base, no spines on the lower side. Superior border of 
meros armed with two obliquely-placed anteapical spines, lower face of 
meros with two rows of spines. Third parr of legs hooked. First pair 
of abdominal appendages nearly straight, reaching forward to the first 
pair of legs, terminating in two long, slender, pointed, horny styles ; 
the anterior style (outer part of the appendage) is a little longer than 
the posterior and slightly recurved; anterior border of the appendage 
carinate but not shouldered. 
