MA|{^•|,\M) fiKor.odUAr. srii\'i:v 123 



]ii(i(lci';ite size; liiti-nil lobes iviriiliirly l)iit moderately rounded; lateral 

 saddles narrower and .-liari)er tiian the (Jtlier saddles; mnbiliei not small; 

 shell thick (v'-S nun.), marked hy line, distinct, closely-set lines of 

 gruwlli. which sweep slnirply hack on the periphery. 



This species is distin,i;iiishc(l from //. {Eiirliiiiiilnrrrds) iilrirhi hy its 

 much less prominent ventral saddles, and hy its less uniforndy rounded 

 transverse section, the sides heing almost without curvature down almost 

 to the very periphery. 



The mintiloid slu'll wliich Tuomey ronuhly described without naming 

 was from the James river and from a horizon exactly corresponding to 

 our Popes Creek occurrence. There is little doubt that it was this 

 species. 



Diameter (restored) of coil of largest specimen about -400 mm. 



Occurrence. — Kaxjemoy Formation. Popes Creek (abundant). 

 Aquia Formatiox. Clifton Beach (fragments rare). 



Collect io)is. — Maryland Geological Survey, Johns Hopkins University. 



Class GASTROPODA. 



Order OPISTHOBRANCHIATA. 

 Suborder TECTIBRANCHIATA. 



Family ACTAEONIDAE. 



Genus TORNATELLAEA Conrad. 

 TOEXATELLAEA BELLA Conrad. 



Plate XX, Figs. 1, la. 2. 



Tornatellaea bella Conrad, 1S60, Jour. Acad. Xat. .Sci. Pbila., 2nd ser., voL iv, 



p. 294, pL slvii, Hg. 23. 

 ToDiateUa bella Clark, 1S9.5, Johns Hopkins Univ. Circ, voL xv, p. -t. 

 TortuiteUa bella Clark, 1896, Bull. 141, U. S. Geol. Survey, p. 63. 



Description. — "Ovate, spire conical; revolving lines numerous, im- 

 pressed, punctate striate." Conrad, 1860. 



Shell solid, ovate in profile, six-whorled; surface with uniform, punc- 

 tate, spiral grooves, crossed only by lines of growth and regularly un- 



