354 REPORT OF NEW JERSEY STATE MUSEUM. 



Faxon, Mem. Mus. Comp. Zool., X, 1885, p. 86. Schooley's Mountain, 



Red Bank, Trenton, Burlington, Camden Co., New Jersey. (Niagara, 

 N. Y. ; Brandywine Creek, Schuylkill River, Reading, Philadelphia, Sus- 

 quehanna River, Bristol, Bainbridge, Carlisle, Pa. ; Cecil Co., Havre 

 de Grace, Gynn's Falls, Druid Hill, Anne Arundel Co., Montgomery Co., 

 Charles Co., Potomac River, Williamsport, Washington Co., Cumberland, 

 Allegheny Co., Md. ; District of Columbia at Washington ; Virginia ; 

 Lake Erie; Lake Superior.) 



Underwood, Bull. 111. State Lab. N. Hist., H, 1886, p. 366. New Jer- 

 sey. (New York, Pennsylvania, Maryland, District of Columbia, Vir- 

 ginia, Lakes Erie and Superior.) 



Hay, Amer. Nat., XXXHL 1899, PP- 960, 964. Southern New York 



to Virginia and Lake Superior. 



Andrews, Amer. Nat., XXXVHL 1904, p. 165, fig. i. (Potomac 



River, Maryland.) 



Mayer, Sea Shore Life, 1906, p. 88. (New York markets.) 



Astacus bartonii (nee Fabricius) Milne-Edwards, Hist. Nat. Crust., H, 1837, 



p. 331. Delaware River and other parts of North America. 

 Cambanis pealei Girard, Proc. Acad. Nat. Sci. Phila., 1852, p. 87. Potomac 



River at Washington, D. C. 



Description. — Bbdy robust, pubescent, especially on carapace 

 and chelae, old examples almost hairless. Hairs persist on 

 fingers of large chelae. Carapace partly ovate, depressed, due 

 to bulging branchial regions. Carapace height about middle of 

 gastric region to point on sternum just before first peraeopods, 

 also at point of areola directly above sternum between second 

 peraeopods, and greatest carapace width at hepatic regions about 

 equal, though width at branchial regions greater. Cervical 

 groove deep, continuous on sides. Areola about half length 

 anterior carapace section, including rostrum. Latter long, broad, 

 reaches middle of fifth joint in antennal peduncle and end of 

 antennular peduncle, rarely slightly longer. Rostral surface 

 deeply concave, edges elevated and thickened, nearly straight, 

 very little converged toward marginal spines. Latter well de- 

 veloped, and long triangular acutely pointed acumen about one- 

 third length of entire rostrum, sometimes more or less. Post- 

 orbital ridges parallel, end in sharp spine in front. Carapace 

 surface finely punctate, finely granulate on sides in old examples 

 Sides spinose, some larger or smaller spines on hepatic region, 

 and few spines on branchial region just behind cervical groove, 

 one usually much enlarged. All these spines better developed 



