OF ARTS AND SCIENCES. 117 



a faint trace of a median longitudinal carina. Post-orbital ridges 

 without anterior spines, swollen posteriorly. Carapace oval, punctate, 

 granular on sides. Antero-lateral border not angulate or notched. 

 No lateral or branchiostegian spines. Cervical groove sub-sinuate. 

 Areola none. Abdomen longer than cephalo-thorax. Anterior seg- 

 ment of telson bispinose on each side, posterior segment round behind. 

 Epistoma triangular. Antennas short, with very small spines on the 

 second and third segments, scale short, broad, inner margin rounded. 

 Third maxillipeds hairy within and beneath. Chela moderate, hand 

 inflated, punctate, ciliate, inner margin ornamented with a row of sharp 

 dentiform tubercles, outside of which is a row of smaller tubercles. 

 Fingers compressed, punctate and costate, movable finger with a single 

 row of tubercles on the outer edge, a prominent rib running along the 

 middle of the upper surface, inner margin excised at base and fur- 

 nished with tuberculiform 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 me- 

 dian and internal spine. Superior border of meros 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 G. Diogenes. 



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



Known localities. Maryland : Carolina Co. (Coll. P. R. Uhler) ; 

 Dorchester 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. Blandingii. 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. argilUcola 

 by its plane rostrum, shape of the hand, etc. 



b. Rostrum with small lateral teeth. 



9. C GiRARDiANUs, sp. nov. 

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

 puncta, slightly convergent; acumen long, ending in a brown corneous 



