248 University of California Publications in Geology [Vol. 8 



shell grows larger the nodes and angulation increase in prominence 

 and the mature shell shows only a slight resemblance to Ficus 

 pyriformis. 



Height 36 mm., width 25 mm.; height of spire 10 mm.; mouth- 

 opening, length 32 mm., width 15 mm.; height of largest specimen 

 120 mm. 



This species is common in the lower Fernando at Elsmere Canon, 

 Los Angeles County (Gabb, English) ; listed by Gabb from other 

 parts of the Santa Clara River Valley, and from Griswold's Ranch. 

 Monterey County; Tejunga Canon, San Fernando Valley (English) ; 

 probably present in the lower part of the Fernando group at other 

 localities ; quite common in the lower part of the Etchegoin formation 

 on Salt Creek, southwest of Coalinga. 



TKOPHOSYCON KERNIANUM Cooper 



Plate 24, figures 4, 5, and 6 



Conrad, Pae. R. R. Re] its., vol. 5, pi. 7, figs. 64, 64a, 65, 65a, 1856. 

 Agasoma (Trophosycon) Tcemianum Cooper, Bull. Calif. Min. Bureau No. 



4. p. 53, pi. 3, fig. 52, 1894. 

 Agasoma tcemianum, F. M. Anderson, Proc. Calif. Acad. Sci., 3rd ser., 



vol. 2, No. 2, p. 188, 1905. 

 Agasoma tcemianum, F. M. Anderson, Proc. Calif. Acad. Sci., 3rd ser., 



vol. 3, p. 19, 1908. 



Agdsoma Lcniiaiiiim, Arnold, Proc. U. S. Nat. Mus., vol. 34, p. 350, pi. 34, 

 fig. 2, 1908. 



Agasoma tcemianum, Arnold, Palaeontology of the Coalinga district: TJ. S. 



Geol. Survey Bull. 396. p. is, 1909. 

 Ficus tcemianum, Dall, U. S. Geol. Survey Prof. Paper 59, p. 75, 1909. 

 ? Ficus tcemianum, Martin, Univ. Calif. Publ. Bull. Dept. Geol., vol. 7, 



p. 148, 1912. 



Shell of medium thickness, pear-shaped; spire low. conical, apical 

 angle about 108°; whorls four to five, body-whorl large; ornamented 

 by narrow, flat-topped, spiral lines of varying widths, the usual 

 sequence being three very fine lines and one coarser line; the coarse 

 lines also have alternately different widths; the widest ones are rarely 

 more than 0.2 mm. wide; these are crossed by numerous very fine 

 vertical ribs, similar to the finer spiral lines; body-whorl marked by 

 two rows of eight to ten very prominent nodes on each whorl, giving 

 the shell an angulated appearance; the lower nodes are generally 

 below the interspaces of the upper ones; nodes evenly conical to 

 vertically elongated, with generally one acute apex, sometimes two 



