116 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



margins are smooth and furnished with hairs, as is the terminal abdom- 

 inal segment. The inner angle of the peduncle of the uropoda is pro- 

 duced. The first pair of legs are somewhat prehensile. All the others 

 are ambulatory. 



2O. Genus CONILERA Leach. 



First pair of antennae with basal article of peduncle not extended 

 straight m front at right angles to remaining part of antenna. Pedun- 

 cle of the second pair of antenna? composed of five articles. The plate 

 of the second article of the maxillipeds is furnished with hooks. 



The first pair of pleopods have the peduncle elongated, somewhat 

 longer than wide, hard, and furnished on the inner side with about nine 

 hooks; the inner branch is rather elongated, narrow, hard, with the 

 inner margin straight, thick, almost bare, the outer margin furnished 

 with moderately long hairs; the outer branch is shorter than the inner 

 branch, ovate, hard, furnished with a longitudinal furrow, with the pos- 

 terior margin furnished with moderately long hairs; the pleopods 

 thus form a large ope rculum, covering the other pleopods. The pedun- 

 cle of the second pair of pleopods is scarcely wider than long; the 

 branches are of the usual structure. 



The peduncle of the uropoda has the inner posterior angle somewhat 

 produced. 



The six segments of the abdomen are distinct. 



ANALYTICAL KEY TO THE SPECIES OF THE GENUS CONILERA. 



a. Eyes present. First pair of antennae extend to the middle of the fifth article of the 

 peduncle of the second pair of antennae. The second pair of antennae extend to 

 the middle of the first thoracic segment. Body four times longer than wide. 



Conilera cylindracea ( Montagu ) 



of. Eyes wanting. First pair of antennae extend to the middle of the first thoracic 

 segment. The second pair of antennae extend to the middle of the seventh 

 thoracic segment. Body five times longer than wide Conilera stygia Packard 



CONILERA CYLINDRACEA (Montagu). 



Oniscus cylindracevs MONTAGU, Trans. Linn. Soc. Lond., VII, 1804, p. 71, pi. vi, 



fig. 8. 

 Conilera montagui LEACH, Diet. Sci. Natur., XII, 1818, p. 348. DESMAREST, 



Consid. Crust., 1825, p. 304. MILNE EDWARDS, Hist. Nat. Crust., Ill, 1840, 



p. 242. 

 Conilera c.i/lindracea BATE and WESTWOOD, Brit. Sessile-eyed Crustacea, II, 1868, 



p. 304. HANSEN, Vidensk. Selsk. Skr. (6), V, 1890, pp. 358-361, pi. iv, 



figs. 5-5c; pi. v, figs. 1-ld. RICHARDSON, American Naturalist, XXXIV, 



1900, p. 217; Proc. U. S. Nat, Mus., XXIII, 1901, p. 515. NORMAN, Ann. 



Mag. Nat. Hist. (7), XIV, 1904, p. 438. 



See Hansen for characters of. genus, Vidensk Selsk. Skr. (6), V, 1890, pp. 358. 



