Notes on Fossils of Utica Formation. 108 
BRACHIOPODA. 
. Leptobolus insignis, Hall, 
. Siphonotreta, sp. 
. Leptena sericea, Sowerby. 
. Orthis testudinaria, Dalman, var. 
D> OF hm 
CEPHALOPODA, 
7. Trocholites ammonius, Conrad. 
8. Endoceras proteiforme, Hall. 
TRILOBITA. 
9. Triarthrus sp. (?) 
10. Calymene senaria, Conrad. 
OsTRACODA. 
11. Leperditia (Primitia) cylindrica, Hall. 
oo %s probably n, sp. 
NOTES ON THE ABOVE FossIts. 
RHABDOPHORA. 
1. DipLocraprous sp.—A few broken and imperfectly pre- 
served stipes of a diprionidian, or petaloid graptolite, 
whose specific relations cannot satisfactorily be ascer- 
tained with the specimens before me. 
POLYZOA. 
2. PacHybioTyA sp.—Several fronds of a species of this 
genus, or of a very closely related one, occur in the col- 
lection. They exhibit a considerably wide nonporifer- 
ous margin. The form in question may possibly fall 
under one of Mr. E. O. Ulrich’s species, but which is 
not as yet definitely ascertained. 
BRACHIOPODA, 
3. Leprono.us instants, Hall,—This species occurs in toler- 
able abundance in the collection, and is well preserved, 
