THE CRUSTACEA OE NEW JERSEY. 267 



Genus SPH/EROMA Latreille. 



Sphcrronia Latreille, Hist. Nat. Crust., VII, 1804, p. 11. "Type Oniscus volu- 

 tator Pallas, first species. 



Body contractile, and able to be rolled into a complete ball. 

 Abdomen of two segments, and first formed by fusion of several 

 coalesced segments. Terminal segments of abdomen entire, 

 roimded. Maxillipeds with second, third and fourth segments 

 of palp not produced into lobes, and with very long hairs. Legs 

 all ambulatory. Both branches of uropoda present, and outer 

 not rudimentary. Latter denticulate along outer edge, movable, 

 capable of folding under inner branch, and both branches similar 

 in shape, salient. Inner branch of uropoda immovable, fixed to 

 side of abdomen. 



A single species in our limits. 



Sphasroma quadridentatum Say. 



Plate 81. 



Sphceronm quadridentata Say, Jonrn. Acad. Nat. Sci. Phila., I, 1818, p. 400. 

 Coast of Georgia and Hast Florida. 



De Kay, N. Y. Fauna, Crust., VI. 1844, p. 44 (on Say). 



■ Verrill, Rep. U. S. F. Com.. I, 1871-72 (1873), p. 315 (habits). 



Flarger, Rep. U. S. F. Com., I, 1871-72 (1873), p. 569, PI. 5, fig. 21. 



Massachusetts to Florida. 



Harger, Proc. U. S. Nat. Mus.. II, 1879. p. 161. Provincetown, south- 

 ward. 



Harger, Rep. U. S. F. Com.. VI, 1878 (1880), pp. 368. 434, PI. 9, 



fig- 53- Great Fgg Harbor, New Jersey. (Florida and Massachusetts.) 



H. Richardson, Amer. Nat., XXXIV, 1900, p. 223. Cape Cod to North 



Carolina region. 



Sphceroma quadridentatum White. Cat. Crust. Brit. Mus., XXV, 1847, p. 102. 

 (St. Catherine's Island, Georgia, on Say's material.) 



• H. Richardson. Proc. U. S. Nat. Mus., XXIII, 1901. p. 533. Massa- 

 chusetts to Florida. 



■ Paulmier, 58th Rep. N. Y. State Mus., IV, 1904, p. 174, fig. 46. (Bar- 

 tow, City Island and Staten Island, N. Y.) 



H. Richardson. Bull. U. S. Nat. Mus.. No. 54. 1905. p. 281, figs. 292- 



293. New England to Florida. 



M. J. Rathbun, Occas. Papers Boston Soc. N. Hist., VII, 1905, p. 39. 



( Southern New England. 



