IND EX. 503 
Ophiodes, description of the new ge- 
nus, 421. 
Orca, new species of, 101. 
Otariade, notes on the skulls of 
some, 228, 
Owen, Prof., on an upper incisor of 
Nototherium Mitchelli, 475. 
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 Sphzerion 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, il 
Phoczena communis, note on, 495. 
Pholas, new species of, 386. 
Physalus 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. 
Pleuronectide, on the, 72. 
Plumatella, new British species of, 
eas 
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. 
Protolyeosa 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. 
Rhabdoccela, on the, 57. 
Rhinoceros leptorhinus, on the denti- 
tion of, 131. 
Rhysium, description of the new ge- 
nus, 483. 
Reemer, 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 Buprestide and Elate- 
ride, 173, 327. 
Selater, 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. KE. 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. 
Spheera, new species of, 386. 
Spheeria, new British species of, 128. 
Spherion, new species of, 478. 
Sphasus, new species of, 452. 
Spider, on a fossil, from the Coal- 
formation, 428. 
Spiders, new, from Equatorial Africa, 
ie 
Spirifer cuspidatus, on the micro- 
scopic shell-structure of, 144. 
