16 PALEONTOLOGY OF NEW JERSEY. 



Of the remaining species several are found in what has been consid- 

 ered the typical Miocene of this country, while very few, except the forms 

 living at the present time, are known to occur in the later beds given as 

 post-Pliocene by Tuomey and Holmes in South Carolina and the neigh- 

 boring territory. 



The fossils obtained from the borings for water at Cape May and at 

 Atlantic City are somewhat different in character from those found at 

 Shiloh and Jericho, in Cumberland County, and may possibly indicate 

 a distinct zoological horizon. The occurrence in the Atlantic City well- 

 boring of several of the larger species of Area which are not known from 

 the Shiloh or Jericho beds might indicate a somewhat different geological 

 level, but local difference might produce this change. Two or three feet, or 

 some times even as many inches, will serve for a change of this charac- 

 ter, within the limits of beds of the same geological age, so that I should 

 not deem them of a different age without positive stratigraphical evidence. 



In the section of formations at Shiloh, Jericho, and the neighboring 

 region there are three different phases shown in the material of the deposits 

 containing fossils: the dark brown or chocolate-colored clay, with fossils, 

 which lies next below the "glass sand;" the stony layer of gray marl, filled 

 with shells of Ostrea and other forms; and below this, the loose sandy gray 

 marl with fossils. In the black or chocolate-colored marls the following 

 species have been recognized among the few specimens sent for identi- 

 fication: 



Pecten Madisonius. Saxicava parilis. 

 Modiola inflata. bilineata. 



Perna torta. Turritella Cumberlandiana. 

 Plicatula densata. requi striata. 



Axinea lentiformis. Crepidula fornicata. 



Kucula proxima. Trochita perarmata. 



Oardium craticuloides. Crucibulum costatum. 



Crassatella melina. Fissurella Griscomi. 



Chama eongregata. Balaims proteus. 



In the stony layer below the chocolate-colored clay the list of species 

 has not been made out, but nearly all of those found in the shell-sand or 

 marl below are recognized. So there does not appear to be much reason 



