THE CRUSTACEA OF NEW JERSEY. 397 



Genus RHITHROPANOPEUS M. J. Rathbun. 



Rithropanopeus M. J. Rathbun, Bull. Labor. Nat. Hist. State Univ. Iowa, IV,. 

 i8g8, p. 273. Type Pilumnus harrisii Gould, designated, monotypic. 



Ridges defining efferent branchial channels, if present, low 

 and confined to hind part of endostome, not extending to front 

 boundary of buccal cavern. Fronto-orbital border half, or more 

 than half, greatest width of carapace. Carapace more or less 

 subquadrate, narrow, length about three-fourths its width, ap- 

 proaching that of Catometopa. Prominent transverse dorsal 

 ridges present. Chelipeds without circular cavity on front edge. 

 Carpal joints of ambulatory legs not armed with horned crest. 

 Terminal segment of abdomen, in male, long. 



Species rather few, one in our limits. 



Rhithropanopeus harrisii (Gould). 



Plate;s 119 AND 120. 



Harris's Crab. 



Pilumnus harrisii Gould, Rep. Invert. Mass., 1481, p. 326. Cambridge viarshes', 



Charles River, Massachusetts. 

 Pilumnus harrisi De Kay, N. Y. Fauna, Crust., VI, 1844, P- 7, PI- 7> fig- ^S- 



Connecticut. 

 Panopeus harrisii S. I. Smith, Rep. U. S. F. Com., I, 1871-72 (1873), p. 547. 



Massachusetts Bay to Florida. 

 — Kingsley, Froc. Acad. Nat. Sci. Phila., 1878, p. 319. Massachusetts Bay 



to Florida. 

 — A. Milne-Edwards, Miss. Sci. Mex. Crust, V, 1878, p. 312, PI. 58, fig. 



3. Mexico to mouth of Charles River, Mass. 

 ■ S. I. Smith, Trans. Conn. Conn., V, 1879, p. 27- Massachusetts Bay; 



Long Island Sound ; St. John's River, Fla. 



R. Rathbun, Rep. Fisher. Ind. U. S., I, 1884, p. 772. Massachusetts Bay 



to Florida. 



Gissler, Amer. Nat., XVIII, 1884, p. 225. Florida to New England. 



J. E. Benedict and M. J. Rathbun, Proc. U. S. Nat. Mus., 1891, p. 



378, PI. 21, fig. 2, PI. 24, fig. 16. Beesley's Point, New Jersey ; Potomac 

 River. 



Paulmier, 58th An. Rep. N. Y. State Mus., IV, 1904 (1905), p. 140, fig. 



loa. New York City, and Fresh Kills, N. Y. 



