232 Geological Reports of the State of New York. 
Though these are maintained to be fucoidal remains in our sand- 
stone; it is conceded, that the ‘curious foot-marks,” the Orni- 
thichnites described by Prof. Hitchcock in the new red sand- 
stone, “ peculiarly characterize that system.” p. 43. This har- 
mony of opinion is an indication of the firm foundation of this 
part of the science. 
The shells formerly referred to the genus T'crebratula, are said 
to belong to other and extinct genera. The mistake has not been 
made by our own geologists alone, if mistake it is. The shell 
remains, and a name so distinguished as that of Sowerby, sustains 
it. True it may be, that what is now defined to be a T'erebra- 
tula, may not exist in our rocks; but to mention no more, Del- 
thyris (Terebratula, Sow.) tripartita seems to be a common and 
widely spread species. p. 35. 
A conclusion drawn from the state of the organic remains, has 
great interest, viz. that the depositions took place ‘in the bed of 
an ocean), undisturbed by violent currents or greatly agitated wa- 
ters.” This is derived from the finely preserved parts of even 
fragile shells, only one stratum being known in the state as an 
exception, “ where the shells are in a fragmentary condition.” 
p- 26, 7. This is true also, as we know from a previous report, of 
only a small portion of the Pentamerus in the limestone at Roch- 
ester, the rock referred to. As in many others the “ valves of bi- 
valves are found apart,” so are they in this; often changed so 
that the hinge is fitted to the mouth; often the valves lie cross- 
wise ; more often piled above each other and petrified in masses, 
the convex matched into the concave side of another valve; often 
entire shells with their valves unmoved; and, often the surface 
of the stratum and sometimes the interior, with fragments of 
valves connected in any way. ‘The indication of a disturbing 
power is here considerable. Is not the evidence far greater in 
the case of the encrinal limestone of Lockport, and the thin stra- 
tum of it at Rochester, where the fragments of the stems of en- 
crinites are promiscuously jumbled together, and the surface made 
up of portions of shells, porites, encrinites, &c.? Beautiful speci- 
meus of the pais encrinal limestone have been spread abroad 
from Lockport... 
The Grccinnilientte caine are not more numerous or im- 
portant, than were to be expected from the state of seologioe! 
knowledge wher the survey had been in considerable part 
