250 University of California Publications in Geology [Vol. 8 



This species is close to T. Icernianum also, from which it differs 

 in having the nodes vertically more elongated and with more than one 

 cusp ; on large specimens the ribbing is coarser on T. s tan for dense. 



Height 55 mm., width 48 mm. ; month-opening length 55 mm., 

 width 25 mm. 



Type locality, the Miocene "Barnacle Beds," Santa Cruz County 

 (Arnold) ; from the top of the Monterey group (Scutella breweriana 

 zone) in Contra Costa County (Univ. Calif. Loc. 1243, 1316) ; one 

 specimen from the San Pablo formation on San Pablo Bay (Univ. 

 Calif. Loc. 1124) ; listed from Monterey formation of Washington 

 (Arnold and Hannibal). 



TKOPHOSYCON CLALLAMENSE (Weaver) 



Ficus clallamensis Weaver, Bull. 15, Wash. Geol. Survey, p. 74, pi. 9, fig. 

 73, 1912. 



This species belongs in the genus Trophosycon, though a satisfac- 

 tory comparison cannot be made between Weaver's figure of an im- 

 perfect cast and the California species of Trophosycon. 



Weaver lists this species from the Chehalis formation (upper part 

 of lower Miocene), though the type came from undifferentiated lower 

 Miocene. 



TKOPHOSYCON OKEGONENSE (Conrad) 



Fusus oregonensis Conrad, Am. Jour. Sci., 1848, reprinted in U. S. Geol. 



Survey Prof. Paper 59, p. 151. 

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



Collected by Townsend at Astoria and described by Conrad, but 

 not since recognized. It may be the same as Weaver's Ficus 

 clallamensis. 



AGASOMA S1NUATUM Gabb 



Plate 25, figures 5 and 6 



Clavella sinuata Gabb, Palae. Calif., vol. 2, p. 5, 1869. 



Agasoma sinuata Gabb, Palae. Calif., vol. 2, p. 46, pi. 1, fig. 7, 1869. 



Shell rather heavy, elongated, spire about one-third height of 

 shell ; whorls four ; suture deeply impressed, bordered by a raised 

 carina; lower part of body-whorl with prominent rounded ridge 

 bounded anteriorly by an impressed groove one millimeter wide, 

 below which the shell narrows to form the canal; suture immediately 



