224 TWEXTY-THIRD REPORT OX THE StaTE CaBIXET. 



the stream below the town. Among the most common forms 

 at this place are Stromatopora erratica of this paper, AcervulaHa 

 Davidsoni, A. profunda, Favosites sp. like F. polymorpha, Cysti- 

 phyllum Americaoium, Cystiphyllxira n. sp., Zaphrentis yigantea, 

 Chonophyllum sp., apparently the same as one in the Upper Helder- 

 berg of lse\Y York and at the Falls of the Ohio, Amplexus YandelU, 

 Streptelasma n. sp., Aulacophyllum sulcatinum, Syringopora sp., 

 having large cells, three species of Cladopora, two species of Aidopora, 

 one very large. Of the Brachiopoda, we find the following : Spirifera 

 euruteines, S. Oweni, S. 3£anni, S. sul)varicosa n. sp., S. pennatus 

 only one individual, Gyrtina Hamiltouensis, Atrypa reticula'ris, 

 Atrypa n. sp. ?, Pentamerella arata, P. ohsolescens, Gypidula Im- 

 viuscida, Rensselaeria Johanni, TerebTatula Romingeri, T. elia, T. 

 jucunda. There are also several forms of fish-teeth known to occur 

 in those same beds. 



Of the Brachiopoda here enumerated, four are of species hitherto 

 known only in the limestones of the Upper Helderberg group ; two 

 others, Gyrtina and Atrypa, are common to the Upper Helderberg 

 and Hamilton ; and one, Terehratula Romingeri, is credited only to 

 the Hamilton group. 



The corals, considered collectively, have a much greater similarit}' 

 to those of the Upper Helderberg than to the Hamilton group. 



At another locality, some seven miles east of Waterloo, near Kay- 

 mond Station, there is an outcrop of white limestone apparently hold- 

 ing a position beneath the Waterloo beds, but entirely destitute of 

 organic remains, except a few indistinct fragments of Stromatopora 

 and an occasional specimen of a large species of Pleurotomaria, which 

 has considerable resemblance to P. arata Hall, a species highly char- 

 acteristic of, and known only from, the Schoharie grit of eastern Xew 

 York. The Raymond Station species {P. Isaacli, of this paper), 

 differs from the Xew York form only in the want of the transverse 

 ridges on the upper side of the volutions and in the greater depression 

 of the spire, and may be considered a closely representative species. 



At the town of Independence, twenty-three miles east of Water- 

 loo, there is a set of strata exposed and quarried which contain a 

 group of fossils very different from the Waterloo rocks. Among 

 them we find Cystiphyllum, Chonophyllum, Zaphrentis and Helio- 

 phyHuui. Of tlie Brachiopods, we find Gran'ui sp. ?, Orthis lowcnsis, 

 Strophodonta demissa, S. perplana (the Hamilton type), S. inegid- 

 st/riata, Spirifera inutilis, S. himesialis, S. aspera and S. pennatus, 

 Gyrtina Ilamiltonensis and Gypldida {Pentaonerus) occidentalis as 

 the more common forms; the whole presenting a more Hamilton 

 aspect than the Waterloo collections. 



