532 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxii. 



secondary transverse sculpture. Named after the type locality, 

 Topanga Canyon. 



Ti/pe.—Gui No. 164980, U.S.N.M. 



Locality. — Head of Topanga Canyon, 3 miles south of Calabasas, 

 Los Angeles County, California. (G. W. Pxlmond and Ralph Arnold.) 



Horizon. — Lower Miocene. 



TURRITELLA INEZIANA, Conrad var. SESPEENSIS, new variety. 



Plate LI, lig. fi. 



Description. — Shell turreted, with slender, tapering spire; number 

 of whorls variable, eight or more; whorls slightly concave, with one 

 very prominent revohing ridge at base, and two equal but less promi- 

 nent ones above. There is also evidence in the type (a rather poorl}^ 

 preserved specimen) of minor spiral lines or riblets, especial!}^ one at 

 the base of the major ridge; suture deeply impressed. 



Dimensions. — Of broken and slightly distorted type; longitude, 

 34 mm. ; latitude, 10 mm. 



Notes. — This form is distinguishable from the typical T. Ineziana 

 {T. hoffmanni of most West Coast authors) by its small size and much 

 more prominently developed spiral ridges. It is abundant but poorl}' 

 preserved at the type locality. May possibly be of specitic value, but 

 if so is allied to T. ineziana. It is associated at the type locality with 

 Modiolus sp,, Ostrea cf. idrimnsis Gabb, and Pecten sespeensis Arnold. 

 Named after the type locality, Sespe oil district, Ventura County, 

 California. 



Ty/Jt;.— Cat. No. 164970, U.S.N.M. 



Locality. — Tar Creek, north of Fillmore, Ventura C'ounty, Cali- 

 fornia. (G. H. Eldridge.) 



ILorizon. — Va({neros formation (lower Miocene). 



SIGARETUS PERRINI, new species. 

 Plate XLI, lig. n. 



Description. — Shell very much elongated for one of this genus; 

 whorls, three or four (type decollete), slightly convex; apex subacute; 

 whorls ornamented with numerous rough revolving lines, each alter- 

 nate one being considerably more prominent than those adjacent; 

 suture prominent, impressed; aperaturepyriform, narrow posteriorly; 

 lower portion of columellar lip slightly flaring. 



Dimensions. — Altitude (restored), 21 mm.; latitude, 9.6 mm.; body 

 whorl, 18.5 mm.; aperture, 14 mm. 



Notes. — This unique species is entirely unlike anything else in the 

 West Coast fauna, so far as known. It is certainly very much elon- 

 gated for this genus. Named in honor of Prof. James Perrin Smith, 

 of Leland Stanford Junior University, California. 



7]/i>tr.— Cat. No. 164979, U.S.N.m! 



