1904.] NATURAL SCIENCES OF PHILADELPHIA. 407 



species. These are enough to identify its fauna with that of another 

 deposit, locahty No. 806 (see Map No. 2), where the shells are abundant 

 and well preserved, but with no external evidence by which to estimate 

 their age. This locality is another hard-stone quarry, where the 

 excavations have uncovered a number of crevices and a cavern of 

 considerable size. The shells are in stalagmitic conglomerate at the 

 mouth of the cavern, and in the crevices, and also in the earth that 

 fills certain of the pockets. They may represent a considerable period 

 of time, but there is no way to distinguish any difference in age. 



Another deposit at the same locality as the one last mentioned is a 

 horizontal band of slightly reddish rock about half-way up the face of 

 the quarry, and from two to three inches thick. This is part of the 

 rock out of which the cave and pockets were eroded, so that the shells 

 here are very much older than the others at No. 806; but here, again, 

 there is no basis for a comparison with the date of No. 807. The re- 

 mains here are obscure casts of Poecilozonites circumfirmatiis and of 

 what appear to be Vertigo and Carychium. 



I collected from three other beds in this neighborhood what seem to 

 represent the same formation as the pockets of No. 806. 



The first of these, locality No. 814, is a newly opened quarry just 

 south from Coney Island. A red-earth pocket [here contained a fine 

 series of Poecilozonites nelsoni, very large, but wanting the most ex- 

 treme examples of both the elevated and the depressed variations. 

 There are also fossiliferous conglomerates in caverns at this quarry, 

 but they are composed of gravel too fine to contain Poecilozonites 

 nelsoni. 



The best fossil specimens of Poecilozonites reinianus came from local- 

 ity No. 815, near Harrington House. They are noticeably larger than 

 the recent specimens. No. 816, near 815, but on the shore of Castle 

 Harbor, has large numbers of Poecilozonites bermudensis zonatus and 

 Poecilozonites reinianus, the former associated with Poecilozonites 

 nelsoni in a conglomerate. 



Bifidaria rupicola, found in the red earth of No. 806, may perhaps be 

 an importation subsequent to the formation of No. 807, and Strobilops 

 huhbardi, found at the same place, possibly may not have been a per- 

 manent resident; but we can safely assume that all the other species 

 from the above localities belong to the epoch of the red-earth streak 

 at No. 807. The remaining three deposits from which I collected are 

 clearly much more recent than No. 807. These are in sand pits, in 

 the nearly pure sand of partially solidified dunes. None of them have 

 any clear signs of red earth, either about them or overlying them. 



