THE CRUSTACEA OE NEW JERSEY. 235 



posteriorly. Opercular plates of uropoda without any air-cavi- 

 ties, those of two anterior pairs deeply bilobed. Uropoda rather 

 produced, with inner ramus originating far in front of outer. 



Oniscus asellus Linnaeus. 

 Plate 71. 



Oniscus asellus Linnaeus, Syst. Nat., Ed. lO, 1758, p. 637. "In Doinibus. Mnris, 

 Hybernaculis, lignis putrides." 



De Kay, N. Y. Fauna. Crust., VI, 1844, P- SL PI- 6, fig. 12. New 



York. 



Stebbing, Hist. Recent Crust. (Intern. Sci. Series LXXIV), 1893, p. 



430. Throughout Europe and North America. 



H. Richardson, Amer. Nat., XXXIV, 1900, p. 305. North America. 



H. Richardson, Proc. U. S. Nat. Mus., XXIII, 1901, p. 562. (Green- 

 land, Massachusetts and Rhode Island.) 



Stoller, 54th Rep. N. Y. State Mus., I, 1900 (1902), p. 2i3r. Sche- 

 nectady, N. Y. 



Paulmier, 58th Rep. N. Y. State Mus., IV, 1904, p. 180, fig. 52. All 



over N. Y. City. 



H. Richardson, Bull. U. S. Nat. Mus., No. 54, 1905, p. 600, fig. 657. 



Pennsylvania, New York City, Schenectady, Syracuse. 



M. J. Rathbun, Occas. Papers Boston Soc. N. Hist., VII, 1905, p. 45. 



(Maine, Massachusetts and Rhode Island.) 



Oniscus affinis Say, Journ. Acad. Nat. Sci. Phila., I, 1818, p. 430. North 

 America. 



White, Cat. Crust. Brit. Mus., XXV, 1847, p. 98. United States. 



Underwood, Bull. 111. Lab. N. Hist., 11, 1886, p. 361. Pennsylvania. 



H. Richardson, Amer. Nat., XXXIV, 1900, p. 305. North America. 



H. Richardson, Proc. U. S. Nat. Mus., XXIII, 1901, p. 563. North 



America. 



Oniscus inurariiis Budde-Lund, Crust. Isopod. Terr., 1885, p. 207. New York 

 and New Jersey. 



Description. — Body about one and one-half times longer than 

 broad, oblong-, ovate. Head broader than long, with frontal 

 edge slightly curved convexly, and pronounced anterior lateral 

 lobes narrowly elongate and rounded anteriorily. Eyes compo- 

 site, small, placed at sides of head at bases of anterior lateral 

 lobes. First antennae small, formed of two segments, obsolete. 

 Second antennae with short basal segment, second segment twice 

 length of first, third segment equals length of second, fourth 

 segment nearly twice length of third, and fifth segment one and 

 one-half times length of fourth. Flagellum formed of three seg- 



