7 
and five species of bivalve shells, dug from a depth of sixty 
feet and more; with fragments of the crumbling and de- 
composing gneiss-rock, lying in boulders sixty feet below 
the surface: with N. Comstock’s letter on the appearances, 
on digging Obed Mitchell’s well. 
16. Venuses, buccinums, and other molluscous remains, 
from the maritime border of Virginia. 

N° IL. 
Second Shelf from the bottom. 
Aw extensive and characteristic collection of the fossils 
belonging to the region south of the Raritan river, and 
extending from the base of the Neversink Hills to Borden- 
town, near the Delaware, in a direction from N. E. to S. W. 
From this singular tract have been derived the following 
articles, to wit: 
1. Enormous gryphites, thick and ponderous beyond 
example, weighing from six to seven pounds, and of great 
variety, filled with marl formed from the ruins of other 
testaceous creatures. 
2. Belemnites, four or five inches long; or, more. pro- 
perly speaking, their crystallized nuclei, or cores. 
3. Joints of the vertebrae, appertaining to cetaceous 
animals. 
4. A cervical joint belonging to a horse. 
5. Part of the leg (tibia) of a mastodon. 
6. Broad elliptical substance, evidently the interverte- 
bral material, or epiphysis of a whale. 
7. Several choice and instructive specimens of the jaw- 
bone, and its excrescences, in the form of teeth; derived 
from a reptile of the same kind with that wonder of Europe, 
called the Animal of Maestricht, or An‘ediluvial Crocodile. 
8. The sandy and marly mass that once filled up the 
cavity in a shell formerly inhabited by a huge nautilus. 
