APPENDIX C. 283 



1850. 223. PJwcnena Americana, New Sp. Agas. Proc. Boston 

 Soc. Nat. Hist., Vol. III., p. 225. Boston, January. 1850. 



1850. 224. On the gills of Crustacea. Proc. Boston Soc. Nat. 

 Hist., Vol. 111., pp. 225-226. Boston, January, 1850. 



1850. 225. Muscular structure of Medusae. Proc. Boston Soc. 

 Nat. Hist., Vol. III., p. 232. Boston, January, 1850. 



1850. 226. Embryonic development of insects. Proc. Boston 

 Soc. Nat. Hist., Vol. III., pp. 236-237. Boston, January, 1850. 



1850. 227. Breathing organs of Mollusks. Proc. Boston Soc. 

 Nat. Hist., Vol. III., p. 237. Boston, January, 1850. 



1 850. 228. Remarks on the development of air-bladders. Proc. 

 Amer. Assoc. Adv. Sc., Third Meeting, Charleston, p. 72. Charles- 

 ton, 1850. 



1850. 229. Remarks on the species common to different forma- 

 tions. Proc. Amer. Assoc. Adv. Sc., Third Meeting, Charleston, 

 p. 73. Charleston, 1850. 



1850. 230. On the morphology of the Medusae. Proc. Amer. 

 Assoc. Adv. Sc., Third Meeting, Charleston, pp. 119-122. Charles- 

 ton, 1850. Edinb. New Phil. Journ., Vol. L., pp. 85-89. Edin- 

 burgh, 1851. 



1850. 231. On the principles of classification (of the animal 

 kingdom). Proc. Amer. Assoc. Adv. Sc., Third Meeting, Charles- 

 ton, pp. 89-96. Charleston, 1850. 



1850. 232. On the structure of the Halcyonoid Polypi. Proc. 

 Amer. Assoc. Adv. Sc., Third Meeting, Charleston, pp. 207-213. 

 Charleston, 1850. 



1850. 233. Geographical distribution of animals. Christian 

 Examiner and Religions Miscellany. Vol. XLVIII., pp. 181-204. 

 Boston, March, 1850. A short resume is published in Bull. Soc. 

 sc. nat. Nenchdtel, Vol. II., fevrier, 1852, pp. 347-350, par L. 

 Coulon pere. Neuchatel, 1852. Reprinted in Edinb. New Phil. 

 Journ., Vol. XLIX., pp. 1-23. 1850. Translated into German in 

 Verhandl. Naturhist. Ver. Preuss. Rheinland und Westphalens, 

 Vol. VII., pp. 228-254. 1850. This paper is a revision with numer- 



