16 



are very uniform; the former has generally only one point 

 to each node on the upper angle, and two on each node of 

 the lower angle, while the latter has two on the upper and 

 two or three on the lower; in general the latter *s nodes 

 are vertically longer, and the cusps are more acutely 

 pointed especially on the larger whorls. 



Some specimens, especially the earlier whorls have the 



nodes small or nearly absent, and an oval outline replaces 



by t -:tt flat *:?. rai line*, en 



the normal angulation of the body whorl. These resemble F. 

 py r i f o rmi s t Gabb, very closely. As the shell grows larger 



the nodes and angulation increase in prominence until the 



f tne total height of 



mature shell shows only slight resemblance to 1?. pyriformis. 

 Z* st anf ordensi s and Pi.cue sp.? from the Lower Miocene 

 of Contra Costa County, both represented only by casts, 

 appear similar to . nodiferus as far as could be told 



'- -:"" ' ClCrJSe '. . -i ? 



from casts. 



This species is listed by Gabb as from both Ellsmere 



. siuv-r-e, emti pr^senc* of nod$ on angle. 

 and Pico Canyons. 



Altitude 36 mm.; width 25mm.; altitude of spire 10mm.; 

 mouth opening length 32 mm., width 15mm.; largest specimen 

 altitude 120 mm. 



