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Cincinnati Society of Natural History. 



longed to the progenitors of our living forms. Prof. Stimpson — that they 

 might very well be the lingual teeth of mollusks, but could not have 

 formed the dentition or spinous armament of any Crustacean. Some 

 Zoologists have suggested that these singular bodies are the teeth of 

 Cyclostomous fishes, and others that they are dermal Ossicles. 



Dr. Newberry discusses quite fully the different views in regard to 

 Conodonts, and comes to the conclusion that more proof is needed to 

 establish their true position. 



Mr. E. 0. Ulrich (Jour, of the Cin. Soc. Nat. His., Yol. L, July, 

 1878,) described and figured several forms that he considered "Annelids" 

 under the new genus Protoscolex, U., but these were the bodies, not teeth 

 or jaws. 



The two species of so-called " Annelids " described and figured under 

 the new genus Walcottia, Miller and Dyer — W. rugosa and W. cookana. 

 M. and D. (Jour, of the Cin. Soc. Nat. His., April and July, 1878). 

 And W. sulcata, James (The Paleontologist, June 10, 1881,) are, probably, 

 no more than the burrows of marine organisms. 



Dr. George Jennings Hinde, F. G. S. , probably the best authority on 

 the subject of Conodonts and fossil Annelid jaws, published the results of 

 his extensive investigations of the large collections made by himself. 

 {Quart. Jour, of the Geol Soc. of London. Vol. XXXV., p. 351, 1879). 



" On Conodonts from the Ghazy and Cincinnati. Groups of the Cambro- 

 SUurian and from the Devonian and Hamilton and Genesee- Shale divis- 

 ions of the Devonian in Canada and the United States." 



In this valuable paper Dr. Hinde alludes to the discovery of Conodonts 

 by different persons at different times, and says that Conodonts were first 

 noticed in America by Dr. J. S. Newberry (Pal. of Ohio, as quoted above). 



u ' The appearance of the American Conodonts are so similar to those 

 from Russia that Pander's descriptions will almost equally apply to both. 

 They occur as very minute, shining bodies, sometimes consisting of a 

 single, more or less conical tooth with an expanded base ; but more fre- 

 quently they possess an elongated basal portion, in which there is generally 

 a large tooth with rows of similar or smaller denticals on one or both sides 

 of the large tooth, according as this is central or at one end of the base. 

 In some forms the large tooth is continued below the level of the base, 

 forming one or more small, blunted extensions ; and in one of the Devonian 

 forms this extension is greatly prolonged and also supported denticles. 

 In other examples there is no prominent central tooth ; but the series of 

 more or less similar teeth are carried on a straight or curved base." 



# # * "The smooth and undisturbed outline of their bases plainly 



