210 CAMFOHNIA ACADKMY OF SCIENCKS. 



ill bliilT west of bath-house, Santa liarliara, and at nM iiiii;atiiii; dilcli, NCiitiiia. 'I'lic 

 specimcMi fijjiired is from the lower San I'tdio series at Deadman Island, and i^ now 

 in tlie (.'ollection of Dclos Arnold. 



Living. — Paget Snnnd (Carpenter). 



Pleistocene. — Saii iV'dro; Santa l>arl)ara; Ventura (Arnold). 



Pliocene. — San I'cdro (Arnold). 



182. Bela sanctae-monicae, sp. no v. 



I'L.VTK VIII, FUi. 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 sculi)ture on lower portion; 

 pillar smooth. 



Dimensions. — Long. 12mm.; hit. 7.5 mm.; body-whorl .S.5 mm.; a|)citure, including canal, 

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



Distinguishable from B.fidicnla by nuicli Itroadci' 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 species. 



Type from lower San Pedro, scries (Pleistocene) at Port I.,os Angeles, near 

 Santa Monica. Five specimens of the same sjiecies, with sligiitly more angulated 

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

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



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



Genus Mangilia ( Leaclt) liisso. 

 The present genus includes all P leurotomidd; without opcrcula. 

 Subgenus Clathurella Carpenter. 



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

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

 from Mangilia; the emargination of the outer lip from Clavaiula; the texture and sculpture of the 

 surface from Bela and Daphnella. 



Pleurotoma linearis Blainv. is a characteristic species. 



183. Mangilia (Clathurella) conradiana Gabb. 



Clatlniiclla conradiana Gaub, Pal. Cal., Vol. II, j). 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, tlie 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 



