330 W. B. CLARK — UPPER CRETACEOUS FORMATIONS OP NEW JERSEY. 



i 



nitic element gradually becomes reduced to the southward and the clays 

 become finer and more micaceous. 



Fossils. — The fossils of the Matawan formation, although not so numer- 

 ous or well preserved as in some of the other members of the Cretaceous 

 series, afford a large number of different species which have been obtained 

 with sufficient frequency to establish beyond all doubt the stratigraphic 

 limits and areal distribution of the formation throughout its entire ex- 

 tent from northern New Jersey to southern Maryland. Many of the 

 species range upward into the overlying formation, while others are 

 limited to the Matawan itself. Among the characteristic and common 

 species found in the formation and determined by the authors are the 

 following : 



Rhabdogonium tricarinatum , var. acutan-^ Hemiaster para status, Morton. 



gulum, Reuss. u Terebratella plicata, Say. 



Frondicularia pulchella, Karrer. 



Ostrea larva, Lamarck. 



Exogyra cosiata, Say. 



Gryphsea vesicularis, Lamarck. 



Anomia tellinoides, Morton. 

 / Amusium conradi, Whit. 

 v Camptonectes burlingtonensis, Gabb. 



Neithea quinquecostata, Sowerby. 

 l Spondylus gregalis, Morton. 

 O Plicatula urticosa, Morton. 



Dianchora echinata, Morton. 



Gervilliopsis ensiformis, Conrad. 



Inoceramus sagensis, Owen. 

 \ Pinna laqueata, Conrad. 

 v Arca quindecemradiata, Gabb. 



Idonearca antrosa, Morton. 



ldonearca vulgaris, Morton. 



Axinea mortoni, Conrad. 



Nucula slackiana, Gabb. 

 r ' Trigonia mortoni, Whit. 



Crassatella vadosa, Morton. 



Crassatella delawarensis, Gabb. 

 Lucina smockana, Whit, 

 v Cardium dumosum, Conrad. 

 > Cardium tenuistriatum, Whit. 

 v Cardium per elongatum, Whit. 

 ^ Cardium multiradium, Gabb. 



Leiopistha protexta, Conrad. 

 v Cymella meeki, Whit. 

 V Veniella conradi, Morton. 

 / Veniella subovalis, Conrad. 

 Calllsta delawarensis, Gabb. 

 i Aphrodina tippana, Conrad. 

 s Cyprimeria densata, Conrad. 

 . Tenea pinguis, Conrad. 

 > Tellirnera eborea, Conrad. 

 v Linearia metastriata, Conrad. 



Veleda lintea, Conrad. 

 Pholadomya occidentalis, Morton. 

 v Panopaea decisa, Conrad. 

 Clavagella armata, Morton. 



Pyropsis naticoides, Whitfield. 

 " Pyropsis reileyi, Whit. 

 1 Pyrifusus cuneus, Whit. 



Odontofusus slacki, Gabb. 



Odontofusus typicalis, Whit. 

 o Volutomorpha conradi, Gabb. 

 v Turbinella (?) verticallis, Whit. 



Voluta (?) delawarensis, Gabb. 



Volutoderma abotti, Gabb. 



Lunatia halli, Gabb. 

 ^Gyrodes altispira, Gabb. 

 \ Gyrodes obtusivola, Gabb. 

 <7 Gyrodes infracarinata, Gabb. 

 / Gyrodes petrosa, Morton, 

 v Margarita abyssina, Gabb. 

 / Xenophora leprosa, Morton. 

 ' Endoptygma umbilicata, Tourney. 



Scalaria thomasi, Gabb. 



