THE CRUSTACEA OF NEW JERSEY. 349- 



— Ortmann. Zool. Jahrb. Syst., VI, 1891, p. 12. New Jersey to Colorado, 

 Wyoming (North Carolina, Mississippi, Louisiana). 



— W. P. Hay, Amer. Nat., XXXIII, 1899, pp. 959, 961. New Jersey to 

 A\Voming and Mississippi. 



Williamson, Ann. Carnegie Mus., I, 1902, p. 235. (Allegheny, Co., 



Pa.). 



Ortmann, Ann. Carnegie Mus., Ill, 1905, p. 398. (Allegheny, West- 



moreland, Washington, Greene, Fayette and Delaware counties, Pa.) 



Cambarus diogcnenes Abbott, Amer. Nat., VII, 1873, p. 83. Trenton, New 

 Jersey. (Impr. err.) 



Cambarus (Barioiiius) diogenes Ortmann, Proc. Amer. Philos. Soc. Phila., 

 XLIV, 1905, pp. (120) 135. (Seaford, Delaware.) 



Ortmann, Mem. Carnegie Mus., II, 1906, p. 402, PI. A, fig. 3, PI. 39, 



fig. II, PI. 40, figs. 6-7. (Penn's Manor, Essington, Ridley Park, Marcus 

 Hook, Waynesburg, Rice's Landing, Smithfield, Dunbar, Pennsville, Bur- 

 gettstown, Badon, Raccoon Township, Troup's Retreat, Stowe and Neville 

 Townships, Edgeworth, Westview, Millvale, Fern Hollow, Nine Mile 

 Run, Schenley Farm, Silver Lake, Bruce's Ice Pond, Carnegie, Jack's 

 Run, Rankin, near Aspinwall, Montrose, Harmarville, Russelton, between 

 Gibsonia and Bakerstown Station, Thornhill, Donohoe, New Alexandria, 

 Dundale, Derrj-, Blairsville Intersection, Livermore, Kiskiminetas Junc- 

 tion, Homer, Creekside, Punxsutawney, Avonmore Station, Kittaning, 

 Renfrew, Branchton, Wampum, Mercer, Pa. ; Seaford, Del. ; Chestertown, 

 Md. ; W. Virginia, Ohio, Indiana, Iowa, Kansas.) 



? Astacus fossor Rafinesque, Amer. Month. Mag. Crust. Rev., II, November, 

 1817, p. 42. Virginia, Pennsylvania, New York. 



Cambarus obcsus Hagen, Mem. Mus. Comp. Zool., II, 1870, p. 81, PI. i, figs. 

 39-42, PI. 3, fig. 163, PI. 9. Illinois, Petersburg, Va., Arkansas, New 

 Orleans, Lake Michigan. 



S. I. Smith, Rep. U. S. F. Com.. II, 1872-73 (1874), p. 639. (Virginia, 



Illinois, Lake Michigan, Arkansas, New Orleans.) 



Description. — Body .smooth. robii.st, short hairs on chelre in 

 fresh examples and these also on hand and fingers in older ones. 

 Carapace partly ovate, rather compressed, transverse diameter 

 slig-htly more than vertical at hepatic region, sometimes even 

 less. Branchial regions widest well forward, not far from cer- 

 vical groove, and latter not interrupted on sides. Areola dis- 

 tinctly longer than half of front section of carapace, very nar- 

 row, generally obsolete in middle, or two lines bordering bran- 

 chial regions in contact in middle of carapace, rarelv small space 

 left between them without an area for punctures. Rostrum more 

 or less lanceolate, rather narrow, reaches hardly beyond distal 

 end of second joint of antennular peduncle, often less. Rostrum 



