ORTMANN : THE CRAWFISHES OF THE STATE OF PENNSYLVANIA 369 



West Virginia: Wetzel Countij, Fishing Creek, New Martinsville; I'leasards 

 Coxiniy, Middle Island Creek, St. Marys. 



PREVIOUS RECORDS. 



Type locality : Smoky Creek, (."arter Ccjunty, Kentucky (Faxon). 



Ohio: Loraiv Con7ity (Faxon); Vermilion River; Beaver Creek; French Creek 

 (Ortmann) ; ]Va;/iie ComU;/, Killbuck Creek, Creston ((_)rtmann) ; Tuscarawas 

 County, Tuscarawas River, (Iiiadenln'itten (Ortmann); Knox County, Big Jelloway 

 Creek (Osburn and ^Mlliamson) ; Licking County (Williamson) ; Franklin County, 

 Alum Creek (Osburn and Williamson). 



3. Cami'.arus (Faxonius) okscurus Hagen. 

 (Plate A, Fig. 1 and 2; Plate XXXIX. Fig. 7a-7f ; Plate XL. Fig. 1.) 



Camhartis olmvrvs Hagen, 1870. p. (i9, PI. 1, f. "2-"5. I'l. H, f. 154 ; Smith, 1874, p. 6:i9 ; Faxon, li^f^l//. p. 148 ; Fa.xon, 



1898. p. 6.52 ; Ortmann, lOOon. p. 402. 

 Cambarus prupinquiiH olmvrvs Faxon, ISK'j", p. 92; Faxon, 'FS.")/). p. 'Mii\ : I'n(li-iv» I. It-t-fi p :{72 : llav 1>^!'n. |i. 



960 964. 

 CnmbaruK priijihujuux and C. n/.s/id/.s Williamson, 19(il. p. Ki. 

 Vamharuii {Fuxoniua) oi.icui-i(.s- Ortmann, 190.54. p. 112. 



Body of the same shape as in ('. ijropinepius, but .-^lightly more robust in old 

 specimens. 



Carapace similar to C. propinquus, but tlie width of the hepatic, as also of the 

 branchial regions, is slightly gi'eater ; G : H : II = 1 : i.l : 1.3 to 1.5. These diHer- 

 ences of dimension may, however, be due to the fact that large individuals of this 

 species are at hand. 



Cervical yroore and areola identical with those of C. projiiiiijuiis, but the areola 

 generally is sliglitly longer than half of the anterior section of the carapace. 



Rostrum similar to that of C jiropinquus, but always without i.ny trace of a 

 median keel. In ycning specimens the rostrum and its acumen are about identical 

 in shape with those of C. propinquus. In nlder specimens there is a tendency to a 

 shortening of the acumen, which often reaches only to the distal end of the second 

 joint of the peduncle of the antennula and to tlie ba.se of the terminal joint of the 

 peduncle of the antenna. The marginal .spines in old individuals are often very 

 small and indistinct, represented by mere angles. The postorbital ridges are as in 

 C. pro]>iuijuus. 



The punctures and spines of the carapace are identical with tiiose of C 

 propinquwi. 



