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 Arca 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 .erve 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. wquistriata. 
Axinea lentiformis. Crepidula fornicata. 
Nucula proxima. Trochita perarmata. 
Cardium craticuloides. Crucibulum costatum. 
Crassatella melina. Fissurella Griscomi. 
Chama congregata. Balanus 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 
