Clark: The San Lorenzo Series of Middle California 167 



shell smooth except for lines of growth. Base of body whorl narrow; aperture 

 semilunate, rather narrow, just strongly produced anteriorly; inner lip covered by 

 a heavy callus which is broad and flat posteriorly, narrowing rapidly in the region 

 of the umbilicus which is almost covered by a callus. The callus is quite similar 

 to that of N. pallida Broderip, 1 *' a Becent West Coast species. 



Dimensions. — Height, about 16 mm. ; height of spire, 3 mm. ; greatest width 

 of body whorl, 12 mm. 



Occurrence. — University of California locality 1131. 



NATICA (NEVEBITA) EECLUZIANA Petit 



Natica recluziana Petit, Deshayes, Mag. de Zool., Mollusca, pp. 3, 7, 1841. 

 Natica recluziana Petit, Tyron, Man. Conch., vol. 8, p. 34, pi. 12, fig. 1, 

 1886. 



Neverita recluziana Petit, Adams, H. and A., Gen. Bee. Moll., vol. 1, p. 208, 

 1853. 



Neverita recluziana Petit, Carpenter, Brit. Assn. Bep., p. 661, 1863. 

 Neverita recluziana Deshayes, Gabb, Geol. Surv. Calif., Palaeontology, 

 vol. 2, p. 77, 1869. 



Neverita recluziana Petit, Cooper, 7th Ann. Bep. Calif. St. Min. Bur., 

 p. 254, 1888. 



Neverita recluziana Petit, in Keep, in West Coast Shells, p. 46, fig. 26, 1892. 

 Neverita recluziana Petit, Williamson, Proe. U. S. Nat. Mus., vol. 15, 

 p. 211, 1892. 



Neverita recluziana Deshayes, Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 2, 

 p. 369, 1892. 



Polynices (Neverita) recluziana Petit, Arnold, Mem. Calif. Acad. Sci., vol. 

 3, p. 314, 1903. 



Neverita recluziana Petit, Arnold, U. S. Geol. Surv., Bull. 309, pp. 25, 28, 



pi. 38, fig. 6, 1907. 

 Neverita recluziana Petit, Arnold and Anderson, U. S. Geol. Surv., Bull. 



322, p. 59, pi. 21, figs. 14a, 14?), 15, 16, 1907. 

 Neverita recluziana Petit, Arnold, U. S. Geol. Surv., Bull. 396, p. 31, pi. 20, 



fig. 2, 1909. 



Neverita recluziana Petit, Weaver, Univ. Calif. Publ., Bull. Dept. Geol , 



vol. 5, no. 16, p. 265, 1909. 

 Neverita recluziana Petit, Arnold, U. S. Geol. Surv., Bull. 398, p. 130, 



pi. 42, fig. 2, 1910. 



Polynices recluziana Petit, Keep, in West Coast Shells, p. 212, fig. 205, 

 1911 ed. 



Neverita recluziana Petit, Smith, Proc. Calif. Acad. Sci., ser. 4, vol. 3, 

 p. 182, 1912. 



Natica (Neverita) recluziana Petit, Clark, Univ. Calif. Publ., Bull. Dept. 



Geol., vol. 8, no. 22, p. 423, 1915. 

 Natica (Neverita) recluziana Petit, Clark, Univ. Calif. Publ., Bull. Dept. 

 Geol., vol. 9, no. 2, p. 15, 1915. 

 Occurrence. — A very common species in the lower beds of the San Ramon 

 formation. 



Natica recluziana Petit is a variable species ; two of the Recent 

 varieties that have been described are N. recluziana alta Arnold and 



137 For description and figures of N. pallida, see Tryon, Man. Conch., vol. 8, 

 p. 37, pi. 14, fig. 2626; pi. 13, fig. 15; pi. 9, figs. 76, 78, 1886. 



