114 PROCEEDINGS OF THE AMERICAN ACADEMY 



sharp anterior spines. Carapace smooth, punctate, granulated on the 

 sides, cervical groove sulcate, sinuate ; a sharp lateral and branchioste- 

 gian spine; sub-orbital angle rounded; an irregular indentation on 

 the side of the carapace, below the lateral spine, on the hepatic region 

 and anterior part of the branchial region; areola broad, smooth, punc- 

 tate, less than one half as long as the distance from the tip of the 

 rostrum to the cervical groove. Telson bispinose on each side. 

 Epistoma triangular, angles rounded. Second and third segment of 

 the antenna? with a strong sharp spine ; scale of moderate length, rather 

 broad, inner margin rounded, outer margin thick, turned outwards at 

 the tip. Third maxillipeds hairy within. Chela moderate, punctate, 

 serrato-tuberculate on internal border, fingers setose on their inner 

 margins, external border of outer finger submarginate. Carpus 

 armed with a strong internal spine and smaller inferior median and 

 external spines. Meros with well-developed biserial spines below 

 and two obliquely placed near the distal end of the superior border. 

 In some specimens one of the superior pair is obsolete. Third pair of 

 legs hooked. First pair of abdominal appendages as in G. Bartonii. 



Length, 48 mm. Carapace, 23 mm. Rostrum, 6 mm. Areola, 

 7 mm. Breadth of areola, 2 mm. 



Saluda River, west of Greenville, S. C. Collected by Prof. D. S. 

 Jordan. Three specimens, one male of the second form, two females. 

 For the opportunity to examine these I am indebted to Prof. O. P. 

 Hay of Butler University, Irvington, Ind. Differs from the other 

 species of the C. Bartonii group by its long, gradually tapering ros- 

 trum, short metacarapace, strongly developed spines of carapace, an- 

 tennas, and meros. The acumen of the rostrum is scarcely upturned 

 at the tip. 



Specimens from North Carolina, Old Fort, McDowell Co., and 

 French Broad River, (in Mus. Comp. Zool. and Acad. Nat. Sci. Phila.), 

 differ from the above in having the rostrum flatter and less attenuated 

 at the tip, a shorter antennal scale, sub-orbital angle produced into a 

 sharp spine. These may prove to be a distinct species from the Sa- 

 luda River specimens. They approach ' G. robustus, but may be dis- 

 tinguished from that species by the longer-pointed rostrum, shorter 

 metacarapace, better-developed spines, etc. 



6. C. dubius, sp. nov. 

 Rostrum short, broad, sides sub-parallel from the base to near the 

 tip, when they suddenly converge to form the short, broadly triangular 

 acumen ; the rostrum is angulated but not toothed at the base of the 



