INDEX. 



503 



Ophiodes, description of the new ge- 

 nus, 421. 

 Orca, new species of, 101. 

 Otariadse, notes on the skulls of 

 some, 228. 



Owen, Prof., on an upper incisor of 

 Nototherium Mitchellii, 4/5. 



Oysters, on green, 221. 



Packard, Dr. A. S., on the develop- 

 ment and position of the Hymeno- 

 ptera, 82. 



Parfitt, E., on a new species of ma- 

 rine worm, 1 ; on two new species 

 of freshwater Polyzoa, 171 ; on 

 some Zoophytes of Devonshire, 

 426. 



Pascoe, F. P., on Sphserion and Mal- 

 locera, 477- 



Peltidea venosa, on the cephalodia 

 in, 104. 



Peraphora, characters of the genus, 

 20. 



Perichasma, characters of the genus, 

 21. 



Peridinium Cypripedium and Uro- 

 centrum Turbo, on the affinities 

 of, 2. 



Peziza, new British species of, 122. 



Phenacia, on a new British species 

 of, 1. 



Phocsena communis, note on, 495. 



Pholas, new species of, 386. 



Physahis Patachonicus, note on, 495. 



Pictet, F. J., on the fossil fishes of 

 Mount Lebanon, 237- 



Plants, on the domestic, of the 13th 

 and 14th centuries, 257. 



Plateau, F., on the vision of fishes 

 and Amphibia, 469. 



PleuronectidiE, on the, 72. 



Plumatella, new British species of, 

 172. 



Polyzoa, on two new species of fresh- 

 water, 171. 



Postfloration, observations on, 261. 



Potamogale, on the genus, 426, 

 498. 



Prisopi, on the habits of the, 265. 



Prostomum lineare, on the organiza- 

 tion of, 57. 



Protolycosa anthracophila, note on, 

 428. 



Protozoa, on a new genus of, 435. 



Psilonia, new British species of, 122. 



Psyrassa, description of the new ge- 

 nus, 481. 



Ransom, Dr. W. H., on the ovum of 



osseous fishes, 249. 

 Reinhardt, Prof., on the discovery 

 of the dermal shield in Megathe- 

 roid animals, 137. 



Reticularia, new British species of, 

 56. 



Rhabdocoela, on the, 57. 



Rhinoceros leptorhinus, on the denti- 

 tion of, 131. 



Rhysium, description of the new ge- 

 nus, 483. 



Rcemer, Dr. F., on a fossil Spider 

 from the Coal-formation, 428. 



Rogers, J. E. T., on the domestic 

 animals and plants of the 13th and 

 14th centuries, 257. 



Royal Society, proceedings of the, 

 131, 249. 



Salticus, new species of, 455. 



Scheuchzeria palustris, new locality 

 for, 338. 



Schiodte, Prof. J. C, on the classifi- 

 cation of Buprestidae and Elate- 

 ridffi, 173, 327. 



Sclater, Dr. P. L., on the systematic 

 position of the Pronghorn, 401. 



Seeley, H., on some new genera of 

 fossil birds, 109 ; on the fossils of 

 the Carstone formation. 111; on 

 a theory of the skull and the ske- 

 leton, 345. 



Sertularia, new British species of, 298. 



Shaughnessy, A. W. E. O', on green 

 oysters, 221. 



Skull and skeleton, outline of a 

 theory of the, 345, 494. 



Smith, Dr. J. A., on a new genus of 

 Ganoid Fish from Old Calabar, 

 112, 495. 



Snakes, new species of, 24. 



Sparassus, new species of, 457. 



Spencer, H., on a theory of the skull 

 and the skeleton, 494. 



Spermogonia, on the value of, as a 

 distinctive character, 105. 



Sphaera, new species of, 386. 



Sphaeria, new British species of, 128. 



Sphajrion, new species of, 478. 



Sphasus, new species of, 452. 



Spider, on a fossil, from the Coal- 

 formation, 428. 



Spiders, new, from Equatorial Africa, 

 451. 



Spirifer cuspidatus, on the micro- 

 scopic shell-structure of, 144. 



