ISOPODS OF NORTH AMERICA. 



261 



" bed 



Fig. 272.— Livoneca californica. a, Maxilliped. x 33. 

 h, Second maxilla, x 33. c, First maxilla, x 33. d, 

 Palp of mandible, x 33. 



The first setrment of the tlionix is long-est, beit)^ 2 nun. in leno-tl). 

 The secoiul and third are suhe(iual, eacii being 1^ mm. long. The 



fourth, fifth, and sixtii arc sube(|ual. 

 each being 1 mm. long. The seventh is 

 shortest, being onl}^ i mm. in length. 

 The head is partly innnersed or set in the 

 tirst thoracic segment, the antero-lateral 

 angles of which extend to about the mid- 

 dle of the head. The epimera are dis- 

 tinctly separated on the last six segments. 

 They are narrow plates, which in the sec- 



FiG. 271.— Livoneca califoenica 

 (After ScHitEDTE AND Meinert). a, 

 Adult FEMALE. &, Lateral view of 

 THORAX. (Both enlarged.) 



ond and third segments do 

 not quite reach the post- 

 lateral angles of the seg- 

 ments. In the last four 

 the epimera extend the full 



length of the lateral margins of the segments. 

 The abdomen is not narrower than the last 

 thoracic segment. The first segment is partly 

 covered at the sides by the seventh thoracic 

 segment. The terminal segment is rounded 

 posteriorly; it is 4 mm. wide and 3i mm. long. 

 The uropoda are not longer, but as long as the 

 terminal abdominal segment. The branches are 

 equal in length and w^idth, are alike in shape, 

 terminating in rounded extremities. 



All the legs are prehensile. ])eing furnished 

 with long, narrow, curved dactyli. There is 

 no carina on the basis of an}' of the legs. 



LIVONECA REDMANNI Leach. 



Livoneca redmanni Leach, Diet. Sci. Nat., XII, 1818, ]). 852. 

 Li roneca de-vnarestii Leacu, Diet. Sci. Nat., XII, 1818, p. 352. 

 Livoneca redmanni Desmarest, Consid. G^n. Crust., 1825, p. 308. 

 Livoneca desmaredii Desmarest, Consid. G^n. Crust., 1825, p. 308. 

 Livoneca redmanni Milne Edwards, Hist. Nat. Crust., Ill, 1840, p. 261. 

 LJvonecu deHiiiarestii Milne Edwards, Hist. Nat. Crust., HI, 1840, p. 261. 

 Livoneca redmanni Milne Edwards, Cuvier's ROgne Anim., pi. lxvi, figs. 4-4a. 

 Livoneca desmareMii Milne P::dwards, Cuvier's Regne Anim., pi. lxvi, figs. 3-3a. 

 Livonjica redmanni ^cmcEDTE Sind Meinekt, Naturh. Tidsskr. (3), XIV, 1883-84, 



pp. 353-358, pi. XIV, figs. 6-12. — Richardson, Aineriean Naturalist, XXXIV. 



1900, p. 221; Proc. U. S. Nat. Mus., XXIII, 1901, p. 531. 



Fig. 273. — Livoneca cali 

 FORNicA. Seventh leg 

 x Hi. 



