7S A REVISION OF THE ASTACID/E. 



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 tuberculifonn 

 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 

 mcros serrate, inferior surface with two longitudinal rows of spines. 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. Dior/cues. 



Length, 65 mm. Carapace, 30.5 mm. Rostrum, 6.5 mm. 



Known Local/tics. 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- 

 diiiijii In Dorchester County it is found far back in the lowlands in the 

 neighborhood of Vienna. 



C. Ulilcri is easily distinguished from C. Diogenes and C. argillicola by its 

 plane rostrum, shape of the hand, etc. 



30. Cambarus Girardianus. 



Plate IV. Hg. 1, Plate IX. figs. 8 a, 3 a'. 



Cambarua Girardianas, FAXON, Proc. Amcr. Acad. Arts and Sci., XX. 117. 1884. 



Majc, form II. Rostrum broad, excavated, margins with a line of 



punrta, 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 deprcssc-d, with sharp anterior spines. Cephalothorax as 



Inn-- as the abdomen. Carapace flattened above, densely and finely punc- 



slightly granulated and finely ciliated on the branchial and hepatic 



Cervical groove sulcate, sinuate, with minute lateral spine, and 



terminating with a small branchiostegian spine; external angle of the orbit 



