210 CALIFORNIA ACADEMY OF SCIENCES. 



in bluff west of bath-house, Santa Barbara, and at old irrigating ditch, Ventura. The 

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

 in the collection of Delos Arnold. 



Living. — Puget Sound (Carpenter). 



Pleistocene. — San Pedro; Santa Barbara; Ventura (Arnold). 



Pliocene. — San Pedro (Arnold). 



182. Bela sanctae-monicae, sp. nov. 



PL.-iTE VIII, Fig. 14. 



Shell small, broadly fusiform; spire elevated; apex subacute; whorls five, convex, slightly 

 angular above, with about sixteen prominent, rounded ribs, which extend from suture to suture; 

 surface sculptured with spiral sulcations; suture deeply impressed, distinct; aperture slightly oblique, 

 subelliptical; canal short; body-whorl ventricose, lacking transverse sculpture on lower portion; 

 pillar smooth. 



Dimensions. — Long. 12 mm.; lat. 7.5 mm.; body-whorl 8.5 mm.; aperture, including canal, 

 6.8 mm.; canal i mm.; defl. 50 degrees. 



Distinguishable from B.fidic^da by much broader form, fewer and less sharply 

 angular whorls, and more ventricose body-whorl, and less elevated spire. The type 

 specimen was examined by Dr. Dall, who pronounced it a new sj^ecies. 



Type from lower San Pedro series (Pleistocene) at Port Los Angeles, near 

 Santa Monica. Five specimens of the same species, with slightly more angulated 

 whorls, were found in the lower San Pedro series of Deadman Island. The specimen 

 figured is the type, which is now in the United States National Museum. 



Pleistocene. — San Pedro; Port Los Angeles (Arnold). 



Genus Mangilia (Leuch.) Risso. 

 The present genus includes all Pleurotomidce without opercula. 

 Subgenus Clathurella Cdrjienter. 



Shell fusiform or turriculated; columella hp without callosity, except a small posterior tooth; 

 no operculum; the cancellated surface, more ventricose form, and more evident canal, distinguish it 

 horn A/a?igi//a; the emargination of the outer lip from Clavalula; the texture and sculpture of the 

 surface from Dcla and Daphnella. 



Pleurotoma linearis Blainv. is a characteristic species. 



183. Mangilia (Clathurella) conradiana Gnhh. 



Clalhuiclla conradiana Gabb, Pal. Cal., Vol. II, p. 7, Fl. I, fig. 12, 1869. Cooper, 7th Ann. Rept. 

 Cal. St. Min., 1888, p. 235. 



Shell small, robust, broadly fusiform; spire high, whorls seven, the first smooth and round, 

 the remainder angulated, concave above, convex below; surface ornamented by ten or twelve rounded 

 transverse ribs, crossed by square elevated ribs, with sometimes smaller ones interposed; on the upper 



