78 A REVISION OF THE ASTACIDA. 
dentiform tubercles, outside of which is a row of smaller tubercles. Fingers 
compressed, punctate and costate, movable finger with a single row of tuber- 
cles on the outer edge, a prominent rib running along the middle of the 
upper surface, inner margin excised at base and furnished with tubereuliform 
teeth; external finger toothed within, hairy at base, outer border marginate. 
Carpus armed with a strong tooth and a few small scattered tubercles on 
the inner side, a stout median anterior spine beneath, and two or three 
smaller ones between the median and internal spine. Superior border of 
meros serrate, inferior surface with two longitudinal rows of spmes. Second 
pair of legs densely ciliate on the inner side near the tip. Third pair of legs 
hooked. First pair of abdominal appendages of male and annulus of female 
as in C. Diogenes. 
Length, 65 mm. Carapace, 30.5 mm. Rostrum, 6.5 mm. 
Known Localities. — Maryland: Caroline Co. (Coll. P. R. Uhler) ; Dorches- 
ter Co.; Talbot Co. (Coll. P. R. Uhler); St. Mary’s Co. (Coll. P. R. Uhler) ; 
Wicomico Co. (Coll, P. R. Uhler); Somerset Co.; Worcester Co. 
This species was discovered by Mr. P. R. Uhler, of Baltimore, in the 
counties of Maryland enumerated above, on the Chesapeake and Atlantic 
coasts of Maryland. It is found in salt marshes, covered twice daily by the 
tides, and also in brackish and fresh-water ditches in company with C. Blan- 
ding. In Dorchester County it is found far back in the lowlands in the 
neighborhood of Vienna. 
C. Uhleri is easily distinguished from C. Diogenes and C. argillicola by its 
plane rostrum, shape of the hand, ete. 
380. Cambarus Girardianus. 
Plate IV, fig. 1, Plate IX. figs. 2a, 2a. 
Cambarus Girardianus, Faxon, Proc. Amer. Acad. Arts and Sci., XX. 117, 1884. 
Male, form I.—Rostrum broad, excavated, margins with a line of 
puncta, slightly convergent ; acumen long, ending in a brown corneous 
upturned tip; a pair of minute, brown horny teeth at base of the acumen. 
Post-orbital ridges depressed, with sharp anterior spines. Cephalothorax as 
5 ? I I 
long as the abdomen. Carapace flattened above, densely and finely punc- 
tate, slightly granulated and finely ciliated on the branchial and hepatic 
roo) ros) 
regions. Cervical groove sulcate, sinuate, with minute lateral spine, and 
o oO b ? Pp 2 
terminating with a small branchiostegian spine ; external angle of the orbit 
