Report of the State Geologist. 259 



About one and one-half miles northeast of Bridgewater village, 

 Oneida county, is a steep hill, No. 4 97 A, which gives but a few unim- 

 portant exposures. The surface stone, which by its angularity indi- 

 cates no great transportation, enables one to construct a rough section 

 of the hill in connection with the few exposures in situ. Near the foot 

 of the hill and in the valley are limestone boulders in w^hich Atryjya 

 reticularis Linue and Leptc^na rhomhoidalis Wahlenberg are com- 

 mon. These are evidently from the Corniferous limestone which 

 underlies the valley and may extend some distance up the hill. 

 Fragments of argillaceous black shale containing very few fossils are 

 common over most of the hill. 



In a little exposure of black argillaceous shale. No. 497A', almost at 

 the foot of the hiL was found a single fair specimen of Liorhynchus 

 which is probabl}'' a flattened L. limitaris^ Vanuxem, although the 

 form is similar to young specimens of L. multicosta, Hall. (See Pal. 

 N. Y., vol. iv, pi. 56, fig. 26.) 



In addition were found several fragments evidently of the same 

 species, with a fragment of a Conularia. Farther up the hill among 

 loose fragments are specimens very closely allied to Liorhynchus 

 limitaris^ Vanuxem. 



Near the summit of the hill in iron-stained shales. No. 497A", more 

 arenaceous and coarse than those described above, which with reason- 

 able certainty were not distant from similar shales in situ, were found: 



Spirifer miicronatus, Conrad. 



Liorhynchus, sp. Small specimens betvreen L. Umitaris, Yanuxem 

 and X. muUicosta, Hall. 



Liorhynchus multicosta, Hall. A dorsal valve with seven plications 

 on the fold. 



Chonete.^ sp. 



N-uculites trUjueter, Conrad (?). 



Grinoid stems. 



Among the loose specimens from other parts of the hill are the follow- 

 ing additional species: 



Athyris spiriferoides, Eaton (?). 



Ghonetes setigera. Hall (?). 



Gonularia sp. 



The section compiled from the above data seems to be as 

 follows: The Corniferous limestone of Babcock Hill forms possibly the 

 base of the hill, but does not extend far up its sides. The greater part 

 of the hill is composed of Marcellus shales, while the summit is capped 

 by Hamilton shales. Although all the fossils found in 497 A^i have 

 been found in the Marcellus with one exception, yet the lithologic 



