Vol. VII] WARING— STRATIGRAPHIC AND FAUNAL RELATIONS 85 



protoconch; transverse sculpture of 12 or more rounded, very 

 prominent elevated ribs or folds ; suture oppressed, the whorl in 

 front prominently constricted with tendency towards tubercles ; 

 aperture narrow, outer lip simple, strongly ribbed, not varicose; 

 four strong, and two or three accessory plaits on inner lip, 

 which has a wash of callus its entire length. Locality 4, L. S. 

 J. U. Pal. Coll. 



This species is similar to the specimen figured as Cancellaria 

 irclaniana (C) by Arnold,*^ but differs in the shape and sculp- 

 ture of the shoulders. 



Named for Mr. Harold Hannibal. 



Olivella spissa, new species 

 PI. 12, Fig. 7 



Small, fusiform, spire low ; smooth and conical ; whorls four 

 or five, suture linear and not impressed ; surface smooth ; aper- 

 ture acute behind, broad in front and deeply notched ; inner lip 

 callous and with seven fine hairlike plications ; a spiral suture- 

 like line at the upper edge of a wash of callous runs from the 

 base of the outer lip around the back of the shell and on to the 

 inner lip. Locality 4, L. S. J. U. Pal. Coll. 



Perissolax blakei Conrad 

 PI. 13, Fig. 9 



Shell elongate ; spire moderately elevated ; whorls six ; body- 

 whorl ornamented by three prominent revolving carinae. The 

 upper two form prominent nodose angles between which is a 

 concave surface ; on the inner whorls, only the upper carina can 

 be seen; a third slightly nodose carina close below the lower 

 large carina; aperture elongated, narrowed into the slender, 

 slightly curved canal ; aperture and canal about two and one- 

 half times as long as the height of the spire ; surface covered by 

 fine spiral ribs. Locality 4, L. S. J. U. Pal. Coll. 



P. tricarinafus Weaver*^ is probably of this species. This 

 species occurs also in the Tejon formation. 



" Bull. 396, U. S. Geol. Surv., p. 52, pi. 4. fig. 22. 



*' P. tricarinafus Weaver, Bull. U. of C, vol. 4, p. 121, pi. 13, fig. 9. 



