670 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXVII. 



ONISCOIDEA. 

 Family LIGIID.E. 



LIGIA OCCIDENTALIS Dana. 



Ligm occidentalis Dana, U. S. Expl. Exp. Crust., XIV, Pt. 2, p. 742, pi. xlix, 

 fig. 7; Proc. Acad. Nat. Sci. Philad., VII, p. 176. — Stimpson, Bost. Journ. 

 Nat. Hist., VI, 1857, p. 506.— Harford, Proc. Cal. Acad. Sci., VII, 1877, p. 

 116. — BuDDE-LuND, Crust. Isop. Terrestria, 1885, p. 264. — Richardson, Proc. 

 U. S. Nat. Museum, XXI, 1899, p. 866. 



Localities. — Sausalito, California, and San Bartolome Bay, Lower 

 California. (Dr. Ritter and party.) 



LIGIA PALLASII Brandt. 



Ligia pallasii Brandt, Bull. Soc. Imper. des Natur. de Moscou, VI, 1833, p. 172. 

 Ligia dilatata Stimpson, Bost. Journ. Nat. Hist., VI, 1857, p. 507, pi. xxii, fig. 8. — 



S. I. Smith, Report of Progress of Geological Survey of Canada, 1878-79. 

 Ligia septentrionalis Lockington, Proc. Cal. Acad. Sci., VII, 1877, Pt. 1, p. 46. 

 Ligia stimpsoni Miers, Proc. Zool. Soc. London, 1877, p. 671 (see footnote). 

 Ligia pallasii Budde-Lund, Crust. Isop. Terrestria, 1885, pp. 261-262. 



Locality. — Lowe Inlet, British Columbia. (Harriman Alaska Expe- 

 dition.) 



Family TRICHONISCID.E. 



TRICHONISCUS PAPILLICORNIS, new species. 



Body covered with low tubercles. 



Color, light brown. Head with 

 sides produced at the antero- 

 lateral angles in large lobes; front 

 t r i a n g n 1 a r 1 y 

 produced with a 

 slight emargi- 

 nation at the 

 apex of the tri- 

 angle. Eyes sit- 

 uated on the lat- 

 eral margins at 

 the base of the 

 an tero- lateral 

 lobes; they are 

 small and black and apparently simple in structure. 

 The peduncle of the antennae consists of five stout 

 joints, the last three of which have the inner mar- 

 gins beset with numerous strong tubercular-like 

 papilla, each surmounted with a tuft of short, stiff 

 hairs or bristles; the fifth joint is also produced at 

 the outer distal angle in an acute process. The fiagellum is composed 

 of about seven joints, the joints being rather indistinctly defined; the 



Fig. 18. — Head and first thoracic segment of 

 trichoniscus papillicornis. x 41. 



Fig. 19. —TRICHONIS- 

 CUS PAPILLICORNIS. 



xl5. 



