82 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



canal, the end of which is broken ; inner Hp slightly incrusted ; 

 surface covered, besides the revolving ribs, by fine lines of 

 growth. Locality 4, L. S. J. U. Pal. Coll. 



This species resembles very much Gabb's Helicaulax costata^'^ 

 of the Martinez formation, but shows no sign of a posterior 

 canal, and the ornamentation is finer. 



Named for Mr. E. J. Boundey of San Jose, California. 



Brachysphingus sinuatus Gabb 



PI. 13, Figs. 7 and 8 



B. sinuatus Gabb, Pal. Cal, vol. 2, p. 156, pi. 26, fig. 35. 

 Shell short, thick, subovate ; spire low ; whorls five, nearly 



hidden by outer whorl ; suture variable, in some specimens 

 linear and in others deep and bordered by a thickening of the 

 succeeding whorl; body-whorl swollen in the middle, and 

 marked by sinuous longitudinal lines of growth which slant 

 slightly from the top towards the back ; minute revolving lines 

 cover the anterior of the body-whorl; aperture broad in the 

 middle, acute behind, and narrowed in front where it is 

 notched; a fold revolves backward from the notch around the 

 anterior portion of the shell, occupying the former position of 

 the notch at the successive stages of growth ; outer lip simple, 

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



This species differs from B. liratiis Gabb, in not having 

 longitudinal ribs which slant from the top of the body-whorl 

 forward, and in having a more callous, notched, inner lip. 



Cylichna costata Gabb 



PI. 15, Fig. 5 



C. costata Gabb, Pal. Cal., vol. 1, p. 143, pi. 21, fig. 107. 



Shell elongated, subcylindrical, widest anteriorly; spire hid- 

 den by outer whorl ; whorls three to four ; surface marked by 

 numerous flattened revolving ribs, with narrow interspaces, 

 and by lines of growth ; aperture long and narrow, widest be- 

 low; small fold in advance on columella; inner lip incrusted. 

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



This species occurs also in the Tejon fonnation. 



i^Pal. Cal., vol. 2, p. 167, pi. 28, fig. 48. 



