Clark: The San Lorenzo Series of Middle California 185 



MIOPLEIONA INDUEATA (Conrad) 



Bostellaria indurata Conrad, U. S. Expl. Exp., p. 727, 1849. 



Miopleiona indurata (Conrad), Dall, U.. S. Geol. Surv., Prof, paper no. 59, 



p. 35, pi. 18, figs. 5, 6, 1909. 

 Miopleiona indurata (Conrad), Weaver, Univ. Wash. Publ. Geol., vol. 1, 

 no. 1, pp. 6, 30, 1916; Calif. Acad. Sei., ser. 4, vol. 6, no. 2, pp. 31, 39, 

 1916; also no. 3, p. 51, 1916. 

 Occurrence. — University of California locality 3051; associated with Acila 

 gcttysburgensis, Tellina lorenzoensis, Agasoma gravidum var., Fusinus hccoxi, 

 Turritella porterensis, Schieaster calif ornica, etc. 



Family OLIVIDAE 

 Genus OLIVE LL A Swainson 

 OLIVELLA QUADRIPLICATA, n. sp. 

 Plate 19, figures 10 and 17 

 Type specimen 11251, Coll. Invert. Palae. Univ. Calif., loc. 1131 

 Shell small, solid, subovate; spire less than one-third of height; whorls five, 

 smooth, gently convex. Sutures narrowly channeled. Aperture long and narrow ; 

 outer lip thin ; pillar short, slightly twisted, with a strong pillar-plate, near the 

 lower end of which is an oblique, fairly deep groove ; above this groove there are 

 four or five medium fine plications, with one heavier plication below the groove. 



Dimensions. — Height, about 10 mm. ; height of body whorl, 7.5 mm. ; greatest 

 width of body whorl, 5 mm. 



Occurrence. — University of California localities 1131, 1173, 1343, 2754, etc. 



Genus ANCILLA Lamarck 



ANCILLA FISHII Gabb 



Plate 19, figures 4, 6-9 and 11 



Ancillaria fishii Gabb, Geol. Surv. Calif., Palaeontology, vol. 2, p. 9, pi. 2, 

 fig. 15, 1866. 



Bullia buceinoides Merriam, Proc. Calif. Acad. Sei., ser. 3, Geol., vol. 1, 

 p. 179, 1899. 



Ancillaria fishii Gabb, Smith, Proc. Calif. Acad. Sci., ser. 4, vol. 3, pp. 175, 

 179, 1912. 



Ancillaria fishii Gabb, Clark, Univ. Calif. Publ., Bull. Dept. Geol., vol. 9, 

 no. 2, p. 15, 1915. 



Ancilla fishii is rather variable in outline, due in part to the heavy 

 callus growth which many times almost completely covers the shell. 



Genus BULLIA Gray 



BULLIA BUCCINOIDES Merriam 



Bullia buceinoides Merriam. Proc. Calif. Acad. Sci., ser. 3, vol. 1, no. 6, 



p. 179, pi. 23, fig. 5, 1898. 

 Bullia buccinoides Merriam, Arnold and Hannibal, Proc. Amer. Philos. 

 Soc, vol. 52, p. 576, 1913. 



