THE MERCHANTVILLE. 



6i 



Cucullaea antrosa 



Cucullaea neglecta .... 

 ■Axinea subaustralis . . . 

 Neithea guinquecostata 



Paranomia scabra 



Cardium spillmani. . . . 



Turnus kummeli 



Martesia Cretacea 



Pyropsis richardsoni. . 

 Rostellites nasutus . . . . 

 Callianassa mortoni. . . 



X 

 X 



X 



Besides the above list of species which have not as yet been 

 observed at all in the intermediate stages, the species of the fol- 

 lowing list fall into the same general category, their occurrence in 

 the intermediate stages being sporadic in nature, in all cases 

 being much less common in the intermediate formations than in 

 the Merchantville-Marshalltown-Navesink-Tinton horizons. 



Nemodon eufaulensis. . 



Pinna laqueata 



Gervilliopsis ensiformis 

 Inoceramus proximus. . 



Lima reticulata 



Cardium tenuistriatum . 



Panopea decisa 



Lunatia halli 



Gyrodes petrosa 



Baculites ovatus 



X 



X 



The forms which are perhaps the most characteristic of the 

 Merchantville fauna and its recurrent phases, are Axinea subau- 

 stralis and the species of the genus Cucullaea, especially C. 

 antrosa, and as a matter of convenience this recurrent fauna may 

 be spoken of as the Cucullaea fauna. 



