358 REPORT OF NEW JERSEY STATE MUSEUM. 



Underwood, Bull. 111. State Lab. N. Hist., II, 1886, p. 367. New Jer- 



sey. (Virginia, Maryland, Georgia.) 



— Faxon, Proc. U. S. Mat. Mus., XII, 1890, p. 619. (Lexington and 

 Dismal Swamp, Va.) 



— Hay, Amer. Nat., XXXIII, 1899, p. 963 (name in key). 



— ■ Mayer, Sea Shore Life, 1906, p. 88. (Neighborhood of New York.) 



Cambarus blandingi Ortmann, Mem. Carnegie Mus., II, 1904-6, p. 431. 

 Princeton, New Jersey. 



Description. — Body compressed, though rather robust, with 

 more or less wide-set minute pubescent patches, especially in 

 males. Carapace little depressed, surfaces convex, partly ovate. 

 Branchial region with width about median, well behind cervical 

 groove. Carapace with upper surface convex, not flattened. 

 Cervical groove deep, interrupted on sides. Areola shorter than 

 half anterior section of carapace, quite narrow, and only few 

 pubescent patches irregularly. Rostrum long, acute, falling but 

 little short of outer end of antennular peduncle, though extends 

 well beyond end of second antennular joint. Rostral surface 

 concave, edges elevated with usually a subterminal spine on each 

 and slight dent before each eye. Edges of rostrum converge in 

 rather long isoceles triangle, and sharply pointed. Postorbital 

 ridges rather long, nearly parallel as viewed above, angulated 

 anteriorly as sharp spine. Sharp anteriorly directed spine at 

 posterior lower portion of cervical groove. Branchiostegal spine 

 small and sharp. Abdomen about long as carapace, slightly 

 wider in female than in male, less than carapace width in latter. 

 Front section of telson on hind lateral corners with one spine 

 each side. Hind edge of telson evenly convex, length about 

 two-thirds width, and length about three-fourths that of front 

 section. 



Epistome broad, rounded anteriorly, oblique laterally. An- 

 tennules with small spine on lower edge of basal joint, though 

 peduncle apparently without other tubercles. Antennal scale 

 moderate, slightly longer than rostrum, reaches beyond an- 

 tennular peduncle. Antennal scale with spine on outer edge 

 strong, and laminar part nearly twice width of marginal spine. 

 Flagellum reaches front edge of sixth abdominal segment at 

 least in male. 



