348 
GEOLOGY OF THE FIRST DISTRICT. 
The section* given by Mr. Bonny, several years ago, shows the position of these fossils. 
It has been published in one of the Schenectady papers, with the description of the “ Lily 
Lncrinite" a name by which it was long known, and the same substantially has also been 
published in the American Journal of Science, Vol. xxvii, 363-4. 
At Schoharie (and in fact in almost every locality where the rocks are not upturned by 
some cause subsequent to their deposition), the Pentamerus limestone and the other members 
of the Helderberg division form successive terraces of variable breadths, exposing mural 
fronts in many places, and offering every facility in the cliffs, and in the ravines that extend 
back from them, for examining the strata and their fossil contents. 
The following fossils of the Pentamerus limestone have been examined and described by 
Mr. Conrad in the annual reports. The remaining fossils will be described in the Paleonto¬ 
logical Report. 
* Mr. Bonny has furnished the following description of their locality: 
It is situated about one quarter of a mile east of the Schoharie court-house, in a perpendicular ledge of rock about fifty 
feet high. The different strata occur in the following order: 
\st st/ratum, about thirty feet. Shell limerock, containing trilobites of the asaphus variety; the orthocera, spirifer and tere- 
hratula of different varieties. 
2d stratum, two feet. In the centre of this stratum is a layer of clay slate, one inch thick, in which is found the 
most perfect lily; it also contains the stag-horn encrinite, trilobites and terebratula, 
3d stratum, eight feet. Stratified limerock containing trilobites, species of the echinus, flustra, and orthocera. 
ith sbratmm, ten feet. Stratified hmerock, containing species of the echinus and flustra. 
bth st/ratxm, ten feet. Lias, contains all the strontianite localities discovered by myself; carbonate and sulphate of stron- 
tian, bary strontianite of Trail, fibrous sulphate of baryta, water-lime coated with some vegetable remains. 
&th stratum. Compact limestone containing Columnaria intermedia, marine shells, encrinites and other organic remains. 
1th stratum. Siliceous limestone with petrifactions. 
8th stratum. Greywacke. 
Remarks on the Section. 
The “ terebratula” in the first stratum are a species of the Pentamerus (the P. gakatus), which is extremely abundant, 
and in the second is a species of Atrypa. The “ clay slate" is an appropriate term for the shale containing the specimens 
of Astrocrinites pachydactylus, if the idea connected with the technical use of that term be discarded. 
The third and fourth strata are the Tentaculite limestone, the upper member of the Water-lime group. The tentacu- 
lites, from their form and general appearance, were long supposed to be the spines of echini. 
The fifth, sixth and seventh strata belong to the Water-lime group. 
The names of fossils used in the above section are now mostly changed. The names given are what the fossils were 
supposed to be by those who found them, and who had few opportunities of ascertaining definitely what they were, either 
by personal communication with competent palaeontologists, (the number of which is extremely small,) or by access to 
libraries, or even to any of the books that have been published on the subject. Although they knew the objects by sight, 
and had names by which they designated them, the objects had not been examined with rigor by those who were compe¬ 
tent to assign their places in a scientific arrangement. Mr. Conrad, the Palaeontologist, has examined and described a 
part of them. 
