447 



Short-nosed Pickerel specifically dis- 

 tinct from the long-nosed, 3. 



Sigillaria from South -Toggins, Nova 

 Scotia, 168; Prof. W. B. Kogers's ex- 

 planation of preservation of whole 

 trunks of, in an erect position, 168. 



Silicate and Borate of Lime from Lake 

 Superior copper region, 348. 



Silk from tree ferns, 48. 



Siluroid, spine of, found in whale's blub- 

 ber, 228. 



Siredon from Caiion Lake, 191. 



S'xstrum pa )i'ulu7n, Gould, 328. 



Skate, embryo, living, 152. 



Slate, black, of Braintree, Mass., New- 

 foundland, near Lake Champlain, and 

 Quebec, Jules Marcou on, 357 ; ditto, 

 fossiliferous, from Dennis River, Me., 

 227; ditto, silicious, from Fall River, 

 Mass., containing prints of shells, 

 discovery of, by Mr. Norman Easton, 

 389. 



Specular iron ore in gold region of 

 Georgia, 22. 



Sperm whale, jaw of, Dr. J. C. White 

 on, 222 ; diseased tooth of, 225 ; tooth 

 with abuornal growth of cementum, 

 183. 



Spermophila bicolor, 119. 



violacea, 119. 



Spinax acanthias, 76. 



Springs, thermal, geological position of, 

 45. 



Squatarola Helvetica, 121. 



Squid, new species of, 4. 



Star-fish, new species of, 424. 



Stauroneis Bnconiana^ Stodder, 27. 



pellucida., Stodder, 27. 



Sterna acuflavida, 21, 134. 



Cayana, 20; nests and eggs of, 



2i. 



fuliginosa, 134. 



regia, 134. 



Wilsoni, 134. 



Stone from centre of a tree at Honolulu, 

 190; examination of, by Di\ A. A. 

 Hayes, 209. 



Stratigraphical relations of Marine de- 

 posits. Prof. W. B. Rogers on, 246, 

 273 ; Prof. Agassiz in reply, 248, 274 ; 

 Prof. Rogers's rejoinder, 249, 274. 



Strepsilas interpres, 121. 



Strychnine, tincture of, a protection 

 from the ravages of insects in objects 

 of Natural History, 5. 



Subsidence and denudation. Prof. Agas- 

 siz on Prof. Rogers's theory of, 271. 



Succinea lyrala, Gould, 40. 



Sula dactylatra. Notes on, and measare- 

 ments of, 125. 



Sula fiber, Notes on, 123. 



fusca, 20. 



Summer yellow-bird, Dr. T. M. Brewer 

 on the distribution and habits of, 2L 



Summer yellow-bird's nest, material of 

 which it is made, 42t;. 



Supposed fossiliferous rocks below Pots- 

 dam sandstone. Prof. \V. B. Rogers's 

 opinion on, 419. 



Sylvicola Blackburnia?, 110. 



Canadensis, 110. 



coronata, 110. 



discolor, Notes on, 110. 



icterocephala, 110. 



maculosa, 110. 



maritima, 110. 



palmarum, Notes on, 110. 



striata, 110. 



Symmetry of anterior and posterior 



limbs in man and animals, 317. 

 Symphemia semipalmata, 122. 

 Syngnathus Peckianus, Habits of, 75. 

 Syrnola subula, Gould, 403. 



Tachypetes aquilus. Notes on, 126. 



Taconic system, Jules Marcou on, 422. 



Tanagra zena. 111. 



Tantalus loculator, 15; breeding-place 

 of, 15. 



Tellurot of Bismuth, from Georgia, 22. 



Tendrils, coiling of, Prof. W. B.' Rogers 

 on, 409. 



Terebra arguta, Gould, 330. 



bijjartita, Gould, 330. 



prvlixa, Gould, 330. 



Terebratella miniata, Gould, 323. 



Terebratula transversa, Gould, 323. 



Termes frontalis, S. H. Scudderon, 287; 

 destructive to living grape vines, 288. 



Tetradymite from Georgia, 22. 



Thalassidroma Wilsonii, 1.31. 



Thermometer, self-registering, new, in- 

 vented by Dr. James Lewis of Mo- 

 hawk, N.'Y., 246 ; Prof. W. B. Rogers's 

 i-eport on, 317. 



Tinnunculus sparvemus, 105. 



Tin ore discovered at Los Angelos, Cal- 

 ifornia, 152; ditto, from Paris, Maine, 

 423. 



Tooth of sperm whale, with abnormal 

 growth of cementum, 183. 



Tornatina apicina, Gould, 139. 



Tragelaphus albovirgalus, Du Chaillu, 

 299. 



Trichas Marylandica, Notes on, 110. 



Trichotropis (Iphinoe) coronata, Gould, 

 324. 



eUipsoidea, Gould, 324. 



Triforis calculiferus, Gould, 389. 



dathratus, Gould, 389. 



intercalaris, Gould, 388. 



Tringa semipalmata, 121. 



Wilsoni, 121. 



Triton (Menople-K.) fossntum, Gould, 329. 



