410 



quedula crecca,) shot in Massachu- 

 setts, 195. 

 Teeth, supernumerary in man, 158. 

 Tetrao cupido, distribution of, 154. 

 Thalassema ^menVrmMm, Stimpson, 113. 

 Theory of the origin and accumulation 



of the protocarbonate of iron in coal 



measures, Prof. W. B. Rogers's, 283. 

 Thompson, Rev. Zadock, death and 



notice of, 313; resolutions on, 313. 

 Toad, Surinam, egg of, its development, 



13. 

 Torpedo occidentalis, dissection of ner- 

 vous apparatus of, by Prof. Wyman, 



21. 

 Tracks in Connecticut River Sandstone, 



355, 160; a new slab of, report on, 



168; of insects, 105. 

 Trappean rocks, metamorphic influence 



of on adjacent strata, 202. 

 Treasurer, Annual Report of, for 1855, 



200. 

 Tree Sparrow, (ZonotricJiia monticola,) 



breeding in Massachusetts, 213. 

 Troglodytes niger, dissection of, 274 ; 



muscular system of compared with 



that of man, 274. 

 Truro, Mass., Greensand formation at, 



238. 



Unio bracteatus, Gould, 228. 



manubius, " 229. 



peirinusy " 228. 



United States, new geological map of, 

 by Prof. H. D. Rogers, 207; geology 

 of southern coast of, 233. 



Uredo effusa, structure of, 210. 



Verd Antique from Roxbury, "Vermont, 



260. 

 Verd Antique, American, analysis and 



notice of, by C. T, Jackson, 314 ; 



remarks on by A. A. Hayes, 318. 

 Victoria Iron Mines, 247. 

 Vocal apparatus of Howling Monkey, 



90. 



Water entering the sea below Boston, 

 chemical characters of, 191. 



Water filter, new, 333, 



Wellingtonia gigantea, 49. 



Widgeon, European, {Mareca penelope,) 

 specimen of obtained near Philadel- 

 phia, 195. 



Wing of Pintail Duck, peculiarity of, 

 169. 



Wisconsin, birds of, 1. 



Zamites in Connecticut River Sand- 

 stone, 18. 



Zeuglodon, 91 ; J. C. Warren's speci- 

 men of, 91. 



Zonotrichia monticola breeding in Mas- 

 sachusetts, 213. 



Zostera marina in fruit, 20. 



