214 RICHARDSON 



Family ^GID^. 

 ROCINELA BELLICEPS (Stimpson). 



jEga belliceps Stimpson, Proc. Acad. Nat. Sci. Phila., xvi, p. 155, 1864. 

 ALga alaskensis LocKlNGTON, Proc. Calif. Acad. Sci., vil, Pt. i, p. 46, 1877. 

 Rocinela alaskensis Richardson, Proc. Am. Phil. Soc, xxxvil, p. 11, 1898. 

 Rocinela belliceps Richardson, Proc. U. S. Nat. Mus., xxi, p. 827, 1S99. 



Locality.— Ydk.Vi\.dX, Alaska (Harriman Alaska Expedition). 



Family CYMOTHOID^. 

 LIVONECA VULGARIS Stimpson. 



Livoneca vidgaris Stimpson, Bost. Jour. Nat. Hist., vi, p. 508, pi. xxil, fig. 

 9, 1857; Proc. Bost. Soc. Nat. Hist., vi, pp. 88, 89, 1859. — Schicedte 

 and Meinert, Naturhistorisk Tidsskrift, XIV, pp. 344-349, pi. XIV, figs. 

 I, 2, 1883-84.— Richardson, Proc. U. S. Nat. Mus., xxi, p. 830, 

 1899. 



Locality. — Zan Francisco Bay (Dr. Ritter and party). 



Family SPHyEROMID^. 

 DYNAMENE TUBERCULOSA Richardson. 

 Dynamene tuberculosa Richardson, Proc. U. S. Nat. Mus., XXI, p. 833, 1899. 

 Z^<ra///)'. — Bodega Bay, California (Dr. Ritter and party). 



SPH^ROMA OREGONENSIS Dana. 



Spha;ro7tia orcgonensis Dana, Proc. Acad. Nat. Sci. Phila., vil, p. 177, 1854- 

 55; U. S. Expl. Exp., Crust., Pt. ll, xiv, p. 778, pi. LII, fig. 4, 1853.— 

 Stimpson, Bost. Jour. Nat. Hist., vi, p. 509, 1857.— Richardson, Proc. 

 U. S. Nat. Mus., XXI, p. 836, 1899. 



Localities. — Popof Island (from fresh water), Yakutat, and Glacier 

 Bay, Alaska; Grenville Channel and Lowe Inlet, British Columbia 

 (Harriman Alaska Expedition). 



SPHyEROMA PENTODON sp. nov. 



Type from Sausalito, California. 



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

 densely granular. 



Head situated transversely, with a prominent ridge on the anterior 

 margin. Eyes placed post-laterally, and composed of many ocelli. First 

 pair of antennae extend to the posterior margin of the head ; flagellum 

 eight-jointed. Second pair of antennae reach the middle of the second 

 thoracic segment ; flagellum composed of fifteen joints. 



Segments of the thorax about equal in length, with the exception of the 

 first, which is somewhat longer than any of those following. The 



