ARNOLD — THE PALEONTOLOGY AND STRATIORAPHY OF SAN PEDRO. 269 



VciitiHii; ami at Rpatiisli P)i<rlit, 8an Piot^o. The spooimcn fie;tirc'(l is from flio upper 

 San I'edro series at San iVnlro, and is now in the eollectiun of Doles Arnojil. 



Living. — Gulf of California; Ecuador (C'arpeuter). 



Pleistocene. — San Pedro; Ventura; San Diego (Arnold). 



283. Euliraa micans (Jarpenter. 



Pi.ATK IX, Fu:. 12. 



liulima micans Cpr., Brit. Assn. Rt-pt., KS63. p. 659. Reeve, Condi. Icon., p. 33, 1865. Tryon, 

 Man. Conch., Vol. VIII, p. 272, Pi. LXIV, figs. 29, 30, 1886. Cooper, 7th Ann. Rept. 

 Cal. St. Min., 188S, p. 240. Keep, West Coast Shells, p. 50, fig. 32, 1892. Williamson, 

 Proc. U. S. Nat. Mus., Vol. XV, 1892, p. 209. 



Shell small, turreted, glossy; apex acute; whorls ten. Hat; body-whorl convex; suture 

 distinct, not impressed; aperture elongate-ovate; outer li]> thin, rather arcuate; inner lip slightly 

 incrusted. 



DimetisJons. — Long. 12 mm.; lat 3.2 mm.; defl. 25 degrees. 



Distingui.-^hahle fiom A', fnlcata by strai<;ht spii-f ami less bulging outer li|); 

 distinguishable from /,'. ImMata by even convexity of hody-whorl. The specimens 

 described were identilied by Dr. Dall. 



Found in the lower San Pedro series at l^eadnian Island and San Pedro, and 

 in the upj)er San Pedro series at Crawfish George's, Los Cerritos, and San Pedro. 

 The specimen figured is from the lower San Pedro series at Deadman Island, and is 

 now in the collection of Delos Arnold. Found also in the Pleistocene at Barlow's 

 ranch, Ventura, and at Spanish Bight, San Diego. 



Livimj. — Straits of Fuca to San Diego (Cooper). 



Pleisfocoie. — Santa P>arbara to San Diego (Cooper): San Pedro; Ventura; 

 San Diego (Arnold). 



Family LXIV. PYRAMIDELLID.E.' 



CJenus Turbonilla Risso. 



Turbonilla Risso, Hist. Nat. Eur. Merid., Vol. IV, p. 224, 1826. Type, Turbonilla lypica Dall & 

 Bartsch, :=Turbonilla plicalula Risso, 1826, non Turbo (^Turbonilla) plicatulus 

 Brocchi, 1S14. 



Shell with sinistral nucleus, slender, having many whorls, with axial' or spiral sculpture, or 

 both; cohmiella straight or twisted, usually with a single fold, which is rarely obsolete; operculum 

 horny, subspiral, with spiral striae on its outer surface. 



Animal with wide, flattened tentacles; mentum elongated, flattened, and bilobed in front; 

 foot large, short, auriculated anteriorly. 



' The portion of the teit relating to this family has been prepared, under the eupervlslon and with the asalslance of W. H. 

 Dall, by Paul Bartscb, aid iu the United States National Museum. 



'Sculpture following the direction of the coil of the whorls is in these diagnoses referred to as tpiral. That at right angles to 

 the spiral sculpture, or In general parallelism with the axis of the shell, is called oiioJ. An endeavor has been made to include all the 

 Pleistocene species known from California, some of which, though found at San Diego, have not yet been obtained at San Pedro. 



