2QO APPENDIX C. 



icut River Sandstone. Proc. Amer. Acad. Arts andSc.,Vo\. III., 

 p. 193. Boston, May. 1855. 



1855. 296. Contributions to the Natural History of the United 

 States of America. Prospectus. 4to. Boston, June. 1855. Re- 

 printed in Amer. Journ. Sc., 2d series, Vol. XX., pp. 149-151. 

 July, 1855. 



1856. 297. Classification in Zoology. Proc. Amer. Acad. Arts 

 andSc., Vol. III., p. 221. Boston, January, 1856. 



1856. 298. On the Geographical Distribution of Turtles in the 

 United States. Proc. Boston Soc. Nat. Hist., Vol. VI., pp. 6-8. 

 Boston, July, 1856. 



1856. 299. Ovarian impregnation in Fishes and Chelonians. 

 Proc. Boston Soc. Nat. Hist.,Vo\. VI., pp. 9-10. Boston. July, 

 1856. 



1856. --300. Embryology of a species of shark (Acantkeus 

 Americanus). Proc. Boston Soc. Nat. Hist., Vol. VI., pp. 37-38. 

 Boston, August, 1856. 



1856. 301. Orthagoriscus mola. Proc. Amer. Acad. Arts and 

 Sc., Vol. III., p. 319. Boston, August, 1856. 



1856. 302. On OimcE. In a letter to J. D. Dana. Amer. 

 Journ. Sc., 2d Series, Vol. XXII., pp. 285-286. September, 

 1856. 



!g^6. 303. The class of Fishes, divided into several distinct 

 classes. Proc. Boston Soc. Nat. Hist., Vol. VI., p. 63. Boston, 

 November, 1856. 



!8 5 6. 304. The Glanis of Aristotle. Proc. Amer. Acad. 

 Arts and Sc., Vol. III., pp. 325-333. Boston, November, 1856. 



1856. 305. On the general characters of orders in the classifi- 

 cation of the animal kingdom. Proc. Amer. Acad. Arts and ^ , 

 Vol. III., p. 346. Boston, December, 1856. 



1856. 306. Notice of the fossil Fishes. Explorations and 

 Surveys for a railroad route from the Mississippi River t<> the 

 J'acific Ocean. Report of explorations in California, by Lieutenant 



