344 REPORT OF NEW JERSEY STATE MUSEUM. 



Jersey Shore, New Albany, Wellsboro, tributary Beach Lake, Reading, 

 Kingston, near Stillwater, State College, Boalsburg, Center Hall, Miles- 

 burg, Beach Creek, Lamar, Pa. ; Home's Valley, Sideling Creek, Town 

 Creek, S. Cumberland, Corriganville, Rawlings, Deer Park, Selbysford, 

 Stoyer, Md.) 



Astacus ciliaris Rafinesque, Amer. Month. Mag. Crit. Rev., H, 1817, p. 42. 

 Brooks near Fishkill, Newburg, etc., N. Y. 



Astacus pusilhis Rafinesque, 1. c. N^ear Saratoga, Lake George, Lake Champ- 

 lain, Utica, Oszvego, etc. 



Cambants pusillus Girard, Proc. Acad. Nat. Sci. Phila., 1852, p. 88. (Lake 

 Ontario, three miles off Oswego, New York, in Lota maculosa.) 



Astacus aifims (nee Say) Milne-Edwards, Hist. Nat. Crust., H, 1837, P- 22>-- 

 North America. 



■Cambarus montanus Girard, 1. c, p. 88. Allegheny ranges in Virginia and 

 Maryland. Tributary of James River, Rockbridge Co., I' a. Shenandoah 

 River, Clark Co., Va. Cumberland, Md. Potomac basin. 



Cambarus longulus Girard, 1. c, p. 90. Middle States of the Union. 



Cambarus acutus (nee Girard) var. b. Hagen, Mem. Mus. Comp. Zo51., HL 

 1870, p. 36, PI. 3, fig. 44. Essex, New Jersey. (New York.) 



Cambarus acutus Abbott, Amer. Nat., VH, 1873, p. 80. Mercer County, New 

 Jersey. (Habits.) 



— S. L Smith, Rep. U. S. F. Com., H, 1872-73 (1874), P- 637. (From 



Hagen and Abbott.) 



R. Rathbun, Rep. Fisher. Ind. U. S., L 1884, p. 814. Great Lakes 



to the Gulf and Missouri to the Atlantic Coast. 



Description. — ^Body robust, sparsely pubescent (in fresh) to 

 naked (in old examples). Carapace well depressed, partly ovate. 

 Branchial regions with width well forward shortly behind cervi- 

 cal groove. Cervical groove deep, uninterrupted on sides. 

 Areola distinctly longer than half anterior section of carapace, 

 rather broad, with about three to five rows of punctures irregu- 

 larly. Rostrum short, broad, usually reaches distal end of 

 second joint of antennular peduncle, hardly extends beyond mid- 

 dle of fourth joint of antennal peduncle. Rostrum with upper 

 surface nearly flat or slightly concave. Edges elevated with- 

 out marginal spines, converge more or less from base, some- 

 times almost parallel and near apex suddenly contract into short 

 triangular acumen with sharp point. Angles at base of acumen 

 rounded, usually well defined, elevated edges continue to apex 

 though slightly decreasing distally from lateral angles. Postor- 

 bital ridges short, almost parallel, angulated anteriorly, but 

 without spine, except in young. Carapace surface punctate, 



