NO. 1309. NATIRAL HISTORY OF THE ISOPODA— RICHARDSON. 659 



Family MQtYDM. 



ROCINELA BELLICEPS ( Stimpson). 



.Ega hdlireps Stimpson, Proc. Acad. Nat. t^t-i., Philad., XVI, 1864, ]>. 155. 

 .Ega (ihink-eiisls Lockin'gto.v, Pror. Cal. Acad. Sci., VII, 1877, Pt. 1, j). 46. 

 Rociveld «/(r.sAe»(.s/.s Kicn.\uiwoN, Proc. Am. Phil. Soc, XXXVII, 1898, p. 11. 

 Rocinella hellicepi^ Ricii.\kdson, Proc. U. S. Nat. Museum, XXI, 18int, p. sl>7. 



Locality.— Y2ik.\xt'd.t, Alaska. (Hairimaii Alaska Expedition.) 

 Family CYMOTHOID J^. 



LIVONECA VULGARIS Stimpson. 



Lwoneca rulgnris Stimpson, Bost. Journ. Nat. Hist., VI, 1857, p. 508, pi. xxii, 

 fig. 9; Proc. Bost. Soc. Nat. Hist., VI, 1859, i)p. 88, 89.— Schkkdte and Mki- 

 NERT,' Naturhistorisk Tidsskrift, XIV, 1883-1884, pp. 344-349, pi. xiv, figs. 

 l_5._RiCHARDsoN, Proc. U. S. Nat. Museum, XXI, 1899, p. 830. 



Locality/.— S&n Francisco Bay. (Dr. Hitter and party.) 

 Family SPH.EROMID.E. 



DYNAMENE TUBERCULOSA Richardson. 

 Hynameneinhermlosa Rich ARBHOS, Proc. IJ. S. Nat. Museum, XXI, 1899, p. 8.33. 

 Xo«//%.— Bodega Bay, California. (Dr. Ritter and party.) 



SPH.ffi:ROMA OREGONENSIS Dana. 



Sph.rromaoregonensis Dana, Proc. Acad. Nat. Sci. Philad., VII, 1854-55, p. 177: 



U S Expl. Exp., 1853, Crust., Pt. 2, XIV, p. 778, pi. lh, fig. 4.-Stimi'son, 



Bost. Journ. Nat. Hist., VI, 1857, p. 509.-Richardson, Proc. V. S. Nat. 



Museum, XXI, 1899, p. 836. 



ZocaUtles.-Fdpoi Island (from fresh water), Yakutat. and Glacier 



Bay, Alaska; Greenville Channel and Lowe Inlet, Britisli (\,luml.ia 



(Harriman Alaska Expedition). 



SPH/EROMA PENTODON, new species. 



Body elliptical in outline; color dark brown; surface minutely hut 



densely granular. . 



Head transversely situated, with a prominent ridge on the anterioi 

 margin. Eyes post-laterally placed, and con.posed ot many ocelli. 

 First pair of antenna, extend to the posterior margin ot the head: 

 flaoellum, eight jointed. Second pair of antenna' reach the middle of 

 the second thoracic segment; tlagellum eomposed of htteen join s. 



Secrments of the thorax about ec,ual in length, with the exeeption t 

 the th-st, which is somewhat longer than any of those tcdlowmg \h. 

 lateral parts, which are not distinctly separated irom the doisal pa. t 



