APPENDIX C. 285 



1850. 245. Announcement of an American Zoological Journal 

 at Cambridge, Massachusetts, "under the direction and editorship 

 of Professor Agassiz," which was never issued. Amer. Journ. Sc., 

 2d Series, Vol. X., p. 287. September, 1850. 



1850. 246. A new naked-eyed Medusa, Rhacostoma Atlanti- 

 cum. Proc. Boston Soc. Nat. Hist., Vol . 1 1 1 ., pp. 342-343. Boston, 

 October, 1850. 



1850. 247. On the pores in the disc of Echinoderms. Proc. 

 Boston Soc. Nat. Hist., Vol. III., pp. 348-349. Boston, October, 

 1850. 



1850. 248. On Lamprey Eels (Petromyzontidae) and their 

 embryonic development and place in the natural history system. 

 Extract from Agassis on Lake Siiperior, pp. 249-252. Edinb. New 

 Phil. Journ., Vol. XLIX., pp. 242-246. Edinburgh, October, 

 1850. 



1850. 249. On the little bodies seen on Hydra. Proc. Boston 

 Soc. Nat. Hist., Vol. III., pp. 354-355. Boston, November, 1850. 



1850. 250. On the soft parts of American fresh water-Mollusks. 

 Proc. Boston Soc. Nat. Hist., Vol. III., pp. 356-357. Boston, 

 November, 1850. 



1850. 251. De la classification des animaux dans ses rapports 

 avec leur ddveloppement embryonnaire et avec leur histoire pale- 

 ontologique. Bibl. Univ. Geneve, Arch. Sc. Phys. et Nat., 4 e 

 serie, Vol. XV., pp. 190-204. Geneve, 1850. 



1850. 252. Classification of Mammalia, Birds, Reptiles, and 

 Fishes from embryonic and paleozoic data. Edinb. New Phil. 

 Journ., Vol. XLIX., pp. 395-398. Edinburgh, 1850. 



1850. 253. Glacial theory of the erratics and drifts of the New 

 and Old Worlds. Edinb. New Phil. Journ., Vol. XLIX., pp. 

 97-117 Edinburgh, 1850. 



1851. 254. The classification of Insects from embryological 

 data. Smithsonian Contributions to Knowledge, Vol. II., No. 6. 

 28 pages. Washington, 1851. 



1851. 255. Contemplations of God in the Kosmos. Christian 



