319 



tical distribution of Trilobitcs in, Rocky Mountains and Calfornia, Occur- 

 185 ; theoretical section of the rocks rence of silver and gold in, 172. 

 of the vicinity of Quebec, 2iS. Rotella superba, Gould, 17. 



Kadiata, Homologies of, Prof. L. 

 Agassiz on, 2Z^). 



Kaphidophora, Descriptions of four 



• species of, from the caves of Ken- 

 tucky, and from the Pacific coast, by 

 Samuel H. Scudder, 6 ; compared 

 with species of Java and Europe, 

 14 ; synonymy of known species of, 7. 



Kaphidophora Agassizii, Scudder, 11. 



stygia, Scudder, 9. 



subterranea, Scudder, 8. 



a;a??^ftosiom«,Scudder,12. 



Rattlesnake, The mode of formation of 

 the rattle of. Prof. J. Wyman on, 121. 



Report of the Auditinsf Committee, 175. 



Reports, Annual, of Treasurer and 

 Librarian for ISOO-fil, Abstracts of, 

 175 ; of Building Committee, 257. 



Resignation of Dr. Samuel A. Green as 

 Curator of Herpetology, 175 ; of A. 

 Binuey as Treasurer ; vote of thanks 

 to, 205 ; of Albert Ordway as Curator 

 of Crustacea, 2S8. 



Resolutions adopted by the Society in 

 regard to the donation of Dr. W. J. 

 Walker, 147 ; in regard to tlie plan 

 of a building designed by Jonathan 

 Preston, 257. 



Respiration of Blenny family and genus 

 Pholis, 103. 



Retsia sexplicata. White and Whitfield, 

 294. 



Rhacochilus, Synonymy of, 130. 



toxotes, Synonymy of,130. 



Rhamdia, Synonymy of, 47. 



Rhodizite, magnesian mineral, from 

 Africa, 99. 



Rhynchonella oimosita, White and 

 Whitfield, 294. 



Ringicula acnthplro. Shumard, 193. 



pnh'hcUti, Shumard, 192. 



siibpcUucida, Shumard, 193. 



Rissoa incompta., Gould, 280. 



(s. g. i^etm) patens, Gould, 280. 



Rock, Gannet, description of, G5; birds 

 breeding on, 06 ; specimens of, per- 

 forated by boring animals, from the 

 bottom of the sea, o'fl" the Coffin 

 Islands, 102. 



Rocks of the Mississippi valley which 

 have been referred to the Chemung 

 group of New York, together witli 

 descriptions of new species of fossils 

 from the same horizon at Burlington, 

 C. A. White and R. P. Whitfield, 

 observations upon, 289. 



Rocks, Primitive, from the Arctic re- 

 gions, 288. 



Taconic and lower Silurian, of 



Vermont and Canada, Jules 

 Marcou on, 239. 



theoretical section of the upper 



Taconic and lower Silurian, 

 of Vermont, 241 ; of the 

 vicinity of Quebec, 248. 



of Texas, cretaceous and car- 

 boniferous, Jules Marcou on, 



Sandrock calciferous, 242, 249. 

 Sandstone, Potsdam, 244, 251. 

 Saxicava distorta, 105. 



flaccida, Gould, 24. 



rugosa, 102, 105. 



Saxidomus aratus, Gould, .30. 

 Scalaria (Scala) Mcarinifera, Shumard, 

 197. 



Forsheyi, Shumard, 195. 



— (Scala) Lamarensis, Shumard, 



197. 



Scales of Megalops, Microscopical ex- 

 amination of, 218. 



Scalpellum imequiplicatum, Shumard, 

 199. 



Scaphiopus, Breeding habits of, 178. 



Scaphites verrucosuH^ Shumard, 189. 



Scintilla thoracica, Gould. 35. 



Scrobicularia (Capsa) adunca, Gould, 

 28. 



caduca, Gould, 28. 



Section, Theoretical, of the rocks near 



Quebec, 248 ; of the upper Taconic 

 and lower Silurian rocks of Vermont, 

 241. 



Selandria, Notice of the genus, by E. 

 Norton, 219. 



(Allantus) barda, 220. 



cerasi, 222. 



flavipes, Norton, 222. 



fnmipennis, Norton, 222. 



halcyon, 222. 



inhabilis, 220. 



(Allantus) marginicollis, 220. 



rosa;, 223. 



(Hoplocampa) rubi, 221 



rudia, Norton, 221. 



riifala. Norton, 221. 



tiiUn, Norton, 221. 



vitis, 219. 



Semele alveata., Gould, 27. 



ditplicafa, Gould, 27. 



nexilis, Gould, 287. 



orndtn. Gould, 281. 



Septifer farcillnta, Gould, 39. 

 Shales, Lorraine, 240, 249. 

 Sheath, Ovarian, of Holconoti, 133. 

 Shells, Description of, collected by the 



North Pacific Exploring Expedition, 

 by Dr. A. A. Gould, 14 ; descriptions 

 of new genera and species of, by Dr. 

 A. A. Gould, 280 ; descriptions of two 

 new species of, by Temple Prime, 273 ; 

 marine, of Nova Scotia, catalogue of, 

 by T. K. Willis, 61. 



Sierra Nevada, Hydrate of iron con- 

 taining gold from, 109 ; specimens of 

 ores from, 169. 



Sigaretus Incidus, Gould, 14. 



Silicious urinary calculi from the ox 

 and sheep, 206. 



Silver and gold in the Rocky Moun- 

 tains and California, 172. 



Slate. IJtica, 242, 249 ; Georgia, 244, 251. 



Solecurtus fibbrpfiattis, Gould, 26. 



debilis, Gould, 26. 



strigosus, Gould, 26. 



^olemy a. pusilla, Gould, 27. 



