434 



BULL?:T1N 54. UNITED STATES NATIONAL MUSEUM. 



Second antenna' longer than the ])ody; flagelhiin composed of about eighty- 

 six articles ('lecidotca ricliardsonii' Hay 



//. First pair of antenna-, with flagelluin composed of live articles, extend half the 

 length of the peduncle of the second antennsp. Second pair of antenna? 

 "prol)al)ly as long as l)Ofly;" flagellum is composed of "at least forty seg- 

 ments " Curidotea miitlmi Ulrich« 



C^CIDOTEA STYGIA Packard. 



Cacidotea sti/gla Packard, Amer. Xaturalist, \', 1871, p. 752, tigs. 132-133. 

 Caridoiea mJcrocephala Cope, Amer. Naturalist, VI, 1872, p. 411, tig. 109; 3d and 



4th Report Geol. Indiana, 1872, pp. 183, 174-175. — S.mith, Amer. Naturalist, 



VII, 1873, p. 244. 

 Ctrridotm i^tygla Packard, 5th Repoit Peabody Acad. Science, 1873, p. 95. — 



S.MiTH, Report U. S. Conunissioner of Fish and Fisheries, 1874, ]>. 661. 

 Aselius sti/(/Uifi Forbes, Bull. 111. State Lab. Nat. Hist., No. 1, 1876, p. 11. 

 dfcidotea dygia Hubbard, Amer. Entomologist, new series, I, 1880, ])p. 36, 79, 



80, fig. 10. 

 Anellm Htyg'rm Underwood, Bull. 111. State Lab. Nat. Hist., II, 1886, ]>. 359. 

 Qecidotea Ktngia Richardson, Amer. Naturalist, XXXIV, 1900, p. 297; Proc. 



U. S. Nat. Mus., XXIII, 1901, p. 553. 



Load it I es. — Grahanrs Spring-, Lexing-ton, Virginia; also Mammoth 

 Cave, Kentncky. and well;? in Indiana; Illinois 

 in deep Avells; '•Richardson's Spring," Mam- 

 nioth Cave, Kentncky. 



Body narrow, elongate, live times longer than 

 wide, '1 nnn.: 10 nnn. 



Head a little wider than long, 1 nnn.: 1^ mm., 

 with the anterior margin slightly excavate. 

 The eyes are al)sent. The first two articles of 

 the first ])air of antemue are subeqnal in length, 

 the s(H-ond one being more slender than the first; 

 the third article is al)oiit two-thirds the length 

 of the second. The Hagcdlnm is composed of 

 abont twelve articles. The hrst tlinn' articles 

 of the second antenme are short and abont ecpial 

 in length; the fonrth is al)ont as long as the 

 hi'st three together; the fifth is one and a half 

 times longer than the fonrth. The fiagellum 

 is composed of about seventy articles. The 

 maxilliped has a palp of live articles. The 

 palp of the mandibles is composed of three 

 articles. 



The segments of the thor-ax are loosely articu- 

 lated. The lateral margins of the segments are not contiguous, but are 



«The first i)air of legs in Cncidoteii smillisii are not described in detail; they are 

 simply sjxikcn <if as being "subchelate." From the figure, however, they appear 

 to be armed not with triangular ]»rocesses, but furnished instead with spines on the 

 inferioi- mai'gin of the propodus. 



Fl(i. 4'.H). — (!.WniK)TEA STYGIA 



I Aktkr Hay). 



