ARNOLD — THE PALEONTOLOGY AND STRATIGRAPHY OF SAN PEDRO. 189 



145. Actaeon (Rictaxis) punctocoelata Carpenter. 



Plate IX, Fio. 6. 



Tomalella pundoccelataQvv.., Brit. Assn. Rept., 1863, p. 646; Jour, de Conch., Vol. XII, 1865, 

 p. 139. Cooper, ytb Ann. Rept. Cal. St. Min., 1888, p. 267. 



Rictaxis ptindoccelata Cpr., Dall, Am. Jour. Conch., Vol. VII, 1872, p. 136, PI. XV, fig. 12. 

 Tryon, Syst. Conch., Vol. II, p. 356, PI. LXXXVII, fig. 28, 1883. Keep, West 

 Coast Shells, p. 125, fig. 115, 1892. Williamson, Proc. U. S. Nat. Mus., Vol. XV, 

 1892, p. 195. Tryon, Man. Conch., Vol. XV, p. 166, PI. LXIX, fig. 24, 1893. 

 Stearns, Proc. U. S. Nat. Mus., Vol. XXI, 1899, p. 298. 



Shell small, elongate, elliptical, thin; spire small, conical; whorls three or four, convex; 

 sculpture consists of numerous fine, spiral impressed lines; body-whorl slightly ventricose; aperture 

 acutely angular above, rounded below; outer lip thin, simple; columella projecting beyond the line 

 of the anterior margin, or truncate obliquely; one sharp, columellar plait. 



Dimensions. — Long. 6 mm.; lat. 2.7 mm.; body-whorl 5 mm.; aperture 3.5 mm. 



Distinguishable from Actmon traskii by projecting columella, more ventricose 

 body-whorl, le.ss effuse anterior lip, and smaller size. 



Rare in the lower San Pedro series at Deadman Island and San Pedro, 

 and in the upper San Pedro series at San Pedro. Found also in the Pleistocene at 

 Spanish Bight, San Diego. The specimen figured is from the upper San Pedro 

 series at San Pedro, and is now in the collection of Delos Arnold. 



Living. — Santa Cruz to San Diego (Cooper). 



Pleistocene.— Santa Barbara to San Diego (Cooper): San Pedro (Arnold); 

 San Diego (Stearns; Arnold). 



Family XLII. TORNATINID^. 



Genus Tornatina A. Adams. 



Shell cylindrical or fusiform, spire conspicuous, ape.x sinistral, suture channeled, columella 

 callous, single plaited. 



Tornatina coarctata A. Adams is a characteristic species. 



146. Tornatina cerealis Gould. 



Plate X, Fio. 5. 



Bu//a (Tornatina) cerealis Gld., Bost. Jour. Nat. Hist., Vol. VI, 1853, p. 278, PI. XIV, fig. 9. 

 Tornatina cerealis Gld., Cpr., Brit. Assn. Rept., 1863, p. 647. Cooper, 7th Ann. Rept. Cal. St. 

 Min., 1888, p. 267. Tryon, Man. Conch., Vol, XV, p. 188, PL L, figs. 39, 40, 1893. 



Shell minute, solid, ovoid-fusiform, white; spire prominent, of three or four whorls rising by 

 regular grades, and mammillate at tip; aperture linear above, gradually widening forward; outer lip 

 salient at middle, and very gradually approaching the body of the whorl posteriorly, unites to it 

 before reaching the suture; columellar margin callous its whole length, with a strong fold at the base. 



Dimensions.— Long. 4.5 mm.; lat. 2 mm.; spire 5 mm.; aperture 3,5 mm. 



