H. Doc. 129. 11 



This species is allied to T. obruta, Conrad, (T. lineata, Lea.,) but 

 that Clairborne shell differs in having fewer revolving lines, and in 

 being indented at the suture. 



VOLUTATITHES, Strains. 



12. v. CALIFORXIANA, Con., pi. 1, fig. 9. Resembles V. Say ana, 

 Con., but smaller, having numerous rounded tubercles instead of the 

 comparatively few spiniform ones of the latter. The tubercles are 

 somewhat oblique ; base with rather distant impressed lines. 



Locality. Canada de las Uvas, with the preceding. 



BUSYCON? 



13. B.? BLAKEI, Con., pi. 1, fig. 13. Fusiform, body whorl bicari- 

 nated ; shoulder profoundly tuberculated ; tubercles acute, transversely 

 compressed ; lower angle distant, entire. Surface covered with rather 

 fine unequal or alternated wrinkled lines ; upper side of the whorls 

 flattened and sloping ; whorls of the spire angulated and tuberculated 

 in the middle. 



Locality. Cafiada de las Uvas, with the preceding. 



The beak of this shell being broken, its form and length are un- 

 certain, and the aperture being concealed in the rock, the generic 

 character can only be inferred from the contour of the shell. This 

 corresponds with Busycon, except in the biangular form of the body 

 whorl, in which respect it differs from any undoubted species that I 

 have seen. 



CLAVATULA? Swains. 



14. c.? CALIFORNICA, Con., pi. 1, fig. 11. Fusiform ; spire conical, 

 volutions rounded, somewhat flattened above ; body whorl ventricose ; 

 beak short and narrow. 



Locality. Cafiada cle las Uvas, with the preceding Allied to C. 

 proruta, Con., of the Claiborne Eocene, but proportionably narrower. 



II. FOSSILS OF THE MIOCENE AND RECENT FORMA- 

 TIONS OF CALIFORNIA. 



CARDIUM, Lin. 



15. c. MODESTUM, (N. S.,) Con., pi. 2, fig. 15. Very small; ribs 

 about 22, narrow ; concentric wrinkled lines on the disk ; posterior 

 margin direct, truncated ; umbonal slope angular ; ligament margin 

 parallel with the basal, and forming nearly a right angle with the 

 posterior margin. 



Locality. San Diego. 



NUCULA, Lam. 



16. N. DECISA, (N. S.,) Con., pi. 2, fig. 19. Suboval or sub-rhom- 

 boidal, posterior margin obliquely truncated ; disk with devaricating 

 striae. 



Locality. San Diego, with the preceding. 



