571 



Ohio gravel-beds, age of, 427. 

 Olivine from St. George, Me., 28. 

 Oozoa, 46. 



Ore deposits, theories of, 197. 

 Orthoceras crebescens, 466. 



crebistriatum, 467. 

 obstruction, 467. 

 rectum, 467. 

 rigidum, 467. 

 unionensis, 467. 

 vertebrale, 317. 

 Orthoceratites, 209, 401. 

 Ostrea, 55, 535. 



compressirostris, 547. 

 larva, 547. 

 marshii, 547. 

 virginica, 543. 

 Oyster, development of the, 531. 



Paeonia, 296. 



Palaedictyoptera, 224. 



Palaeolithic implements from America 

 and Europe, 421. 



Paludina, 62, 107. 



Paradise, great dikes at, 325. 



Paramoecium, 339. 



bursaria. 51. 



Parkman, Francis. Gift of portrait of 

 Alex. Agassiz, 276. 



Parypha crocea. 116. 



Pecten, 539. 



Pentameroceras minim, 483. 



Perigonimus, 394. 



Peripatus, 107. 



capensis, 108. 

 edwardsii, 108. 

 torquatus, 108. 



Perna ephippium, 539. 



Petromyzon, 109. 



Phalansterium, 136. 



Phyllirhoe,391. 



Physemaria, 91. 



Pieris rapae, 337. 



Piloceras, 317, 371, 402. 



Pisidium, 535. 



Plakina, 98. 



Planorbidae, 116. 



Pleurotomaria, 317. 



Polynomials, use of, as names in zoologv, 

 164. 



Polypodium, 391. 



Pope. W. C, and Co. Gift of a male and 

 female Kiwi, 517. 



Porifera, 49. 



Proterospongia haeckelii, 135. 



Protohydra, 118, 392. 



Protomyxa aurantiaca, 66. 



Protozoa. 45. 



Ptinus fur, 337. 



Pulsatilla, 296. 



Putnam, F. W. The exploration of the 

 peat deposit at Shrewsbury, 242; 

 jiccount of recent explorations of 

 mounds in Ohio, 215; notes on a 

 collection of perforated stones from 

 Califox-nia, 356; notes on Belostoma 

 in carp ponds, 336; notes on bone 

 fish-hooks, 240; on a black flint im- 

 plement from Ohio, 242; on palaeo- 

 lithic implements from America and 

 Europe, 421 ; on the manufacture of 

 stone implements by primitive man. 

 324; on two species of wasps ob- 

 served in Ohio, 465; primitive man 

 in North America, 447; remarks on 

 bronzes from Peru, 240; remarks 



on the life of Capt. N. E. Atvvood, 

 337; remax-ks on the life of Cordelia 

 A.Studley, 419; the serpent mound 

 in Adams Co., Ohio, 518. 



Rana, 62. 



Ranunculus, 296. 



socialis, 71. 



Reniera filigrana, 84. 



Rhabdomena, 150. 



Rhachitomi, 121. 



Ridgway, Robert. Notes on some 

 type-specimens of American Trog- 

 lodytidae in the Lafresnaye collec- 

 tion, 383. 



Rotifera, 56. 



Sagitta, 107. 



Salamandra, 62. 



Sannionites, 402. 



Saprolegnia, 391. 



Sarsia, 393. 



Scolithus,319. 



Scudder, S. H. Remarks on the glands 

 and extensile organs of the larvae 

 of blue butterflies, 357; report of 

 the committee of the Council on a 

 zoological garden in Boston, 523. 



Sepioidea, 112. 



Seriola zonata, 391. 



Serpent mound in Ohio, 518. 



Sertularidae, 116. 



Shaler, N. S. The origin ofkames,36; 

 origin of the divisions between the 

 layers of stratified rocks, 408. 



Silicea,49. 



Snakes, habits of, 163. 



Soils, colors of, 219. 



Spirogyra, 67. 



Spondylus, 535. 



Spongelia pallescens, 60. 



Spongia, 99. 



graminea, 69. 



Spongilla, 70, 214. 



Spongomonas, 136. 



Sporangites, 45. 



Sprague, C. J. Gift of his collection of 

 N. A. lichens, 249. 



Stejneger, Leonhard. On the type 

 specimen of Euryzona eurizonoides 

 (Lafr.), 461. 



Stenotaenia walked, 257. 



Stereotaeceras, 214. 



Stone implements, manufacture of, by 

 primitive man, 324; quarries worked 

 by the Indians for material for, 333. 



Stratified rocks, origin of divisions be- 

 tween layers of, 408. 



Studley, Cordelia A., notice of the 

 death of, 419. 



Subei-ites, 61. 



suberea, 71. 



Sycaltis conifera, 100. 

 ovipara, 84. 

 testipara, 83. 



Sycandra raphanus, 69. 



Sycetta primitiva, 100. 



Sycones, 61. 



Sycyssa huxleyi, 92. 



Taconic, use of the name, 343. 

 Taeniolata, 116. 

 Telephonus, 214. 

 Tethya hispida, 69, 



