336 W. B. CLARK — UPPER CRETACEOUS FORMATIONS OF NEW JERSEY. 



Radula pelagica, Morton. 



Lithodomus ripleyana, Gabb. 



Trigonarca transversa, Gabb. 

 u Cibota rostellata, Morton. 

 , Cibota multiradiata, Gabb. 

 , Idonearca antrosa, Morton. 

 v Idonearca vulgaris, Morton. 



Axinea alta, Whit. 



Pyropsis retifer, Gabb. 



Pyropsis richardsoni, Tuomey. 



Pyropsis obesa, Whit. 



Pyropsis septemlirata, Gabb. 



Pyrifusus cuneus, Whit. 



Neptunella. mullicaensis, Whit. 

 ■ Odontofusus typicus, Whit. 



Odontofusus medians, Whit. 

 yVolutomorpha conradi, Gabb. 

 * Volutomorpha ponderosa, Whit. 

 y Vasmn conoides, Whit. 



Rostellites nasutus, Gabb. 

 „ Volutoderma ovata, Whit. 

 sTurbinopsis hilgardi, Conrad. 



Turbinopsis carta, Whit. 



> Cithara mullicaensis, Whit. . 

 Rostellites compacta, Whit. 



► Nautilus dekayi, Morton. 

 Baculites ovatus, Morton. 



Veniella conradi, Morton. 

 ^ Callista delawarensis, Gabb. 



Apkrodina tippana, Conrad. 



Cyprimeria excavata, Morton. 

 , Periplomya elliptica, Gabb. 

 ^ Panopsea decisa, Conrad. 

 ^ Legumen planulatum, Conrad. 



Clavagella armata, Morton. 



v Rostellaria spirata, Whit. 

 / Rostellaria Jiebe, Whit. 



Anchura compressa, Whit. 



vGyrodes abbotti, Gabb. 



yGyrodesinfracarinata, Gabb. 

 ^ Gyrodes altispira, Gabb. 

 v Lunatia halli, Gabb. 



•■Amauropsis punctata, Gabb. 



Margarita abyssina, Gabb. 

 i Margaritella abbotti, Gabb. 

 v Xenophora leprosa, Morton. 



JFurritella encrinoides, Morton. 



v Turritella vertebroides, Morton. 



„ Turritella lippincotli, Whit. 



, Actseon forbesiana, Whit. 



" Cinulia naticoides, Gabb. 



v Dentalium subarcuatum, Conrad. 



\Belemnitella americana, Morton. 



RANCOCAS FORMATION. 



Name. — The Rancocas formation previously named * and characterized, 

 is so called from its typical development in the valley of Rancocas creek 

 in Burlington county, New Jersey. It comprises in general terms the 

 Middle Marl bed of Professor Cook, although portions of that author's 

 Yellow Sand may be here included, while other portions may fall within 

 the next higher division, although it seems more probable, however, that 

 certain yellowish sands in eastern Monmouth county, derived in part from 

 the underlying greensand marls, but of Miocene age, were regarded as part 

 of the Upper Cretaceous, so that the Yellow Sand is not to be sought for 

 in the Cretaceous at all, and need not be further considered. 



Areal distribution. — The Rancocas formation occupies the country to 

 the east of the Monmouth formation, and extends from Raritan bay to 

 the valley of Severn river in Maryland, where its last outcrop occurs. 

 In northern New Jersey the width of outcrop of the main body of the 

 formation to the south of the escarpment is generally between three 



* Journal of Geology, vol. ii, p. 166, 1894. 



