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University of California Publicatiom in Geology [Vol. 12 



all wide open at their extremities and extending more than two-thirds 

 the distance to the margin. Inner rows of small, oval-shaped pores 

 extend in continuously divergent lines to the margin ; outer rows of 

 slit-like pores diverge and then, when about one-half the distance to 

 the margin, converge close to the inner rows at the end of the petal 

 proper; sporadic pores continue beyond. Petals distinctly elevated, 

 but merge with the submarginal area toward the periphery of the 

 test. Odd anterior petal extends slightly nearer the margins than 

 the others. Inferior surface slightly concave to tlie peristome. Am- 

 bulacral furrows broad, deep, and undivided ; extend from the mouth 

 through the marginal notches on the upper surface, where they con- 

 tinue as median grooves on the petals for about one-half the distance 

 to the apical system ; indistinct branches are sent off on the under side 

 when about two-thirds of tlie distance to the margin. Periproct large, 

 round, and inframarginal, nearly marginal. Tuberculation consists of 

 small tubercles, crowded together, and of the same size over both 

 surfaces of the test. 



Related forms. — Astrodapsis cuyamanus is most closely related to 

 A. ivhitneyi Remond, having the general shape of the former, but 

 may be separated from it by the greater width of its petals which 

 extend closer to the margin. It also resembles A. coalingaensis Kew, 

 but may be distinguished by having small uniform tubercles over the 

 test instead of larger ones on the petals, as in the latter species ; also 

 by its wider petals. 



Geologic horizon. — Upper San Pablo group (Santa Margarita for- 

 mation), Upper Miocene. Associated with Astrodapsis whitneyi 

 Remond. 



Locality. — Cuyama Valley, one mile west of ranger's cabin in 

 Branch Canyon, center of NW. 14 of Sec. 1, T. 9 N., R. 27 W., Santa 

 Barbara County, California, Univ. Calif, loc. 3078. 



ASTRODAPSIS FERNANDOENSIS Pack 

 Plate 24, figures 2a, 26, 2c 



Astrodapsis fernandoensis Pack. Univ. Calif. Publ. Bull. Dept. GeoL, vol. 



5, 1909, p. 279, pi. 24, figs. .3, 4. 

 Astrodapsis fernandoensis. English, ibid., vol. 8, 1914, pi. 2.3, fig. 5. 

 Astrodapsis fernandoensis. Stefanini, Boll. Soc. geol. ital., vol. 30, 1911, 



p. 706. 



Astrodapsis fernandoensis. Clark and Twitchell, U. S. Geol. Surv. Mon., 

 vol. 54, 1915, pp. 217-218, pi. 101, figs. 1, 2. 



