State Museum of Natural History. 



89 



genus from the Upper Helderberg, Hamilton and Chemung 

 Groups. From the Palaeontology of New York, vol. IV, pp. 

 252-257; unpublished. Proc. Am. Philos. Soc., vol. X, pp. 

 246-254. Philadelphia, 1866. 8vo. 



143. On the Occurrence of an Internal Coluvoluted Plate within the 



Body of Certain Species of Crinoidea. Proc. Boston Soc. Nat. 

 Hist., 1864, vol. X, pp. 33, 34. Boston, 1866. 8vo. 



144. Notes upon the Geology of some Portions of Minnesota; from 



St. Paul to the Western part of the State. Trans. Am. Philos. 

 Soc, 1866, pp. 329-340. Philadelphia, 1867. 4to. 

 145- * On the Structure of the Mountains and Valleys in Tennessee, 

 Northern Georgia and Alabama. Proc. Am. Ass. Adv. Sci., 

 15th meeting (Buffalo), 1867, p. 105. Cambridge, 1867. 8vo. 



146. * Remarks on the Geological Structure of Southern Minnesota. 



Ibid., p. 105. 



147. * Observations on the Structure and Mode of Growth of the 



Spines on the Cardinal Area of Chonetes, with Remarks on the 

 Distribution of some Species of the Genus. Ibid., p. 105. 



148. * On the Structure of the Spires in the Genera Athyris, Meris- 



tella, and other Genera of Spiriferidae. Ibid., p. 105. 



149. *Ou some Characters of Spirifera, and the Geographical and 



Geological distribution of some of the Species. Ibid., p. 106. 



150. Notice of volume IV of the Palaeontology of New York. 



Twentieth Ann. Report N. Y. State Cab. Nat. Hist., pp. 145- 

 167. Albany, 1867, 8vo. Also printed separately. 

 Contributions to Palaeontology. Ibid. 



151. Introduction to the study of the Grapolitidae. Ibid., pp. 169-240, 



4 plates. 



152. The Genus Chonetes. Ibid., pp. 242-244. 



153. Reports on the Genera Productus, Strophalosia, Aulosteges and 



Productella. Ibid., pp. 245-250. 



154. On the Genera Spirifera, Cyrtina, and allied genera. Ibid., pp. 



251-257. 



155. On the Genera Athyris, Merista and Meristella. Ibid., pp. 258- 



266. 



156. Note upon the Genus Zygospira and its Relations to Atrypa. 



Ibid., pp. 267-268. 



157. Remarks upon, the Genera Rhynchonella and Leiorhynchus. 



Ibid., pp. 269-273. 



158. Note on the Genus Eichwaldia. Ibid., pp. 274-278. 



159. On the Genus Tropidoleptus. Ibid., pp. 279-281. 



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