764 



NORTH AMERICAN INDEX FOSSILS. 



Caloosahatchie (Pliocenic) of Florida; living off Atlantic coast. 



526. N. bidentata Emmons. ( Fig. 1 1 1 3. ) Miocenic and Pliocenic. 

 Like N. trivittatoides, but stouter with coarser ribs and pro- 

 portionally finer spirals; outer lip with two strong teeth (lirae) 

 on inner side. 



Miocenic marls of North Carolina and New Jersey (Shiloh). 

 Caloosahatchie and Shell Creek Pliocenic of Florida, abundant. 



527. N. harpuloides Conrad. Miocenic. 

 Whorls square-sided, spire elevated; spirals on shoulder oblique 



to suture; labial callus thick, outer lip thick, somewhat reflected, 

 and lirate; a subsutural ridge occurs. 



Chesapeakean of Virginia, North Carolina. 



528. N. scalaspira Conrad. Miocenic. 

 Shorter and more acute spire than preceding ; last whorl inflated ; 



spiral sculpture on latest whorl parallel with the suture. 

 Chesapeakean of Virginia, North Carolina, etc. 



Family Fulgurid^e* Grabau and Shimer. 



CLII. Tudicla Bolten. 



Shell with papillose protoconch, and rapidly enlarging whorls, 



with nearly flat almost horizontal shoulder, and spinose angulation, 



the whorls embracing to the angle ; a second row of spines often 



Fig. 



Tudicla tnarylandica, X %- ( Md. Survey. ) 



occurs on body of whorl. Anteriorly drawn out into long fusiform 

 canal; columellar lip plicate near the base; outer lip lirate. Ter- 

 tiary-Recent. 



