Vol. 4] Weaver. — Palaeontology of the Martinez Group. 



10!) 



Dentalium cooperi Gabb. 

 Daitalium, stramineum Gabb. 

 Ficopsis angulatus, n. sp. 

 Hcterotcrma gabbi Stanton. 

 Heteroterma trochoid ea Gabb 

 Keteroterma, Lnclet. 

 Megistostoma striata. Gabb. 

 Morio tuberculatus Gabb. 

 Natica, sp. 



Pcrissolax tricamatus, n. sp. 

 Perissolax blaJeei Gabb. 



Siphonalia lineata Stanton. 

 Architectonica tuberculoid, a. sp. 

 Strepsidura pacheoensis Stanton. 

 Tritonium im press n m . n. sp. 

 Tritonium eocenicum, n. sp. 

 Tritonium pulchrum, n. sp. 

 Turritella infragranulata Gabb. 

 Turritella pachecoensis Stanton. 

 Turritella conica, a. sp. 

 Tii iris. sp. indet. 

 Urosyca caudata (!a!il>. 



In the outcroppings just north of Army Point railroad station 

 numerous fossils were obtained. A list of the known species 

 from this locality is given in the tattle below. 



These speeies are nearly all fairly abundant at this locality, 

 and the majority of them occur in both the lower and upper 

 portions of the series in the vicinity of Martinez. Since only the 

 upper portion of the series is fossiliferous, the locality just north 

 of Army Point station may lie correlated with the Middle Mar- 

 tinez beds in Contra Costa County. 



In southern Lake County fossils have been found at several 

 localities on Herndon Creek, about one mile southeast of the town 

 of Lower Lake. At a point about one-fourth of a mile southeast 

 of the town, on the road to Knoxville, a large number of species 

 have been found. Many of these are not represented in the vicin- 

 ity of the Strait of Karquines. The lower five hundred feet of 

 strata are non-fossiliferous, and resemble very closely the non- 

 fossiliferous beds at Army Point. The majority of the fossils 

 were collected about six hundred feet from the base of the series. 

 The larger proportion of forms resemble those belonging to the 

 upper beds at Martinez and not occurring in the lower. From 

 the stratigraphic position of the beds and the nature of the 

 included faunas it seems best to correlate the Martinez beds at 

 both Benicia and Lake County with the middle and upper at 

 Martinez. 



The following table represents all the forms occurring in the 

 Martinez group at Martinez, Benicia and southern Lake County. 

 The occurrence of these species in the type section at Martinez, 

 whether lower or upper beds, or both, is also indicated. 



