Bibliography of Louis Agassiz. 3 1 3 



Theorie der Erratischen Blocke in den Alpen. {Neues 

 yahrbuch fiir Miner alogie^ Geognosie, Geologic und Peirefaktenkunde^ 

 1838, pp. 303,304.) 



Three Different Modes of Teething among Selachians. 



{Amer, Naturalist^ v. viii., Mar., 1874, pp. 129-135.) 



Unconformability of the Palaeozoic Formations of the 



United States. (Amer. Assoc. for the Advanc. of Sci. Proceedings, 

 1851, pp. 254-256.) 



Ursprung des Loess, {Neues yahrbuch fiir Mineralogie, Geog- 

 nosiCy Geologic und Petrefaktenkunde, 1867, pp. 676-680.) 



Vegetable Character of Xanthidium. (Amer. Assoc. for the 

 Advanc. of Sci. Proceedings, 1849, PP* S9-91.) 



Verbal Sketch of Prof. Johannes Miiller. (Bost. Soc. of 

 Nat. Hist. Proceedings, v. vi., 1856-59, pp. 382, 383.) 



Vertebrate Fossiles Exhibited to the Association. (Amer. 

 Assoc. for the Advanc. of Sci. Proceedings, 5th meeting, 185 1, pp. 

 178-180.) 



*Voyage d*Exploration Scientifique dans I'Atlantique et 



I'Ame'rique du Sud. (Revue des Cours Scientifique, 2e ser., T. iv., 

 1873, pp. 1077-1093.) 



Wassergefass-System der Mollusken. {Zeitschrift fur 

 Wissenschaftliche Zoologie, Leipzig, 1856, p. 176.) 



* Water-tubes in Fishes. (Bost. Soc. of Nat. Hist. Proceed- 

 ings, V. iii., 1848, pp. 27, 28.) 



Same. {Amer, yi. of Sci, and Arts, 2d ser., v. vi., 1848, 



pp. 431,432.) 



Young Garpipes from Lake Ontario. {Amer. y I, of Sci, and 

 Arts, 2d ser.,v. xxiii., 1857, p. 284.) 



Zoological Character of Young Mammalia, (Amer. Assoc. 

 for the Advanc. of Sci. Proceedings, 1849, PP* S5~S9.) 



Zoological Notes. {Amer, yi, of Sci, and Arts, 2d ser., v. 

 xiii., 1852, pp. 425,426,) 



*Zo61ogical Researches. {Edinhm-gh New Phil. yi. , v. xliv. , 

 1848, pp. 316-319.) 



* Same, In German. {Neue Notizen aus dem Gebiete der 



Natur- und Heilkunde, 3te ser., Bd. v., 1848, col. 145-148; Bd, 

 vii., cols. 293, 294.) 



