1914] Dickerson: Fauna of the Martinez Eocene of California 141 



Dimensions. Major axis, 35 mm. ; minor axis, 23 mm. ; height, 

 11 mm. 



Occurrence. University of California Locality 790. 



This species differs from A. tejonensis Gabb of the Tejon in having 

 a rounded apex instead of a pointed curved one, and in shape of base. 



Named for the Martinez group, in which it was found. 



FISSUEELLA(f) BEHE1, n. sp. 

 Plate 12, figure 9 



Shell oval, conical, with form and decoration like an individual 

 coral ; apex acute, with round aperture ( ? ) , located two-fifths of length 

 from anterior end; margin crenulated; surface of shell marked by 

 fourteen acute, nearly straight, radiating ribs with concave interspaces 

 twice their width. 



Dimensions. Major axis, 12 mm.; minor axis, 10 mm.; height, 

 7 mm. 



Occurrence. University of California Location 243, Trochocyathus 

 zitteli zone, type locality of Martinez Group. 



Named in honor of Mr. Ernest Behr. 



NERITA(?) BIANGULATA, n. sp. 

 Plate 12, figure 12 



Shell semiglobose, with low immersed spire, whorls three. The 

 body whorl is marked by spiral lines and transverse nodose ribs. The 

 other whorls are also nodose. Mouth subquadrate. The shell is marked 

 by two angles a right angle setting off the body whorl from the spire 

 and an obtuse angle which divides the body whorl in halves, both of 

 which are flattened. Inner lip callused with plications; outer lip 

 characters unknown. 



Dimensions. Height, 10 mm. ; width of body whorl, 6 mm. 



Occurrence. University of California localities 243 and 211. 



This species is easily distinguished from N. triangulata Gabb by its 

 having only two angulations and by the presence of transverse, nodose 

 ribs. 



NATICA (GYRODES) LINE AT A, n. sp. 



Plate 13, figure 3a, 36 



Shell of moderate size, solid, thick, moderately elevated, and marked 

 by strong spiral lines. These spiral lines are crossed by growth lines 

 occasionally ; five rounded whorls which are distinctly channeled ; body 



