INDEX. 
- common potato and on its introduction 
into Europe, 154. 
Oreocome, characters of the genus, 50. 
Ostrea, new species of, 288. 
Owen, Prof., on the habits of Echidna, 
126; on the genus Phascolomys, 128 ; 
on the geographical distribution of ex- 
tinct mammalia, 197; on the anatomy 
of the chimpanzee, 476. 
Papilio, on Indian species of, 454. 
Parus, description of a new species of, 452. 
Pausside, on the ceconomy of the, 88. 
Pearce, J. C., on the occurrence of the 
embryo of an Ichthyosaurus, 44. 
Petrosciadium, characters of the genus, 
50 
Pfeiffer, Dr. L., on the genus Achatinella, 
133 ; on new species of Helix, 431; on 
new species of land-shells from Jamaica, 
441. 
Phascolomys, on the species of, 128. 
Philodromus, new species of, 38. 
Pholcus phalangioides, notice respecting, 
77 
Phrynosoma Harlani, votes on, 99. 
Phyllobius, on the British species of, 12. 
Physoderes, characters of the genus, 67. 
Pieris, new species of, 22. 
Planorbis imbricatus, on the red colour 
of the blood in, 454. 
Plantain, on the disease of the, 212. 
Plants, contributions to the physiology of 
the fecundation in, 5; descriptions of 
new, 50, 357, 359. 
Platycercus, new species of, 59, 288. 
Pleuropetalum, characters of the genus, 
Pleurotoma, new species of, 363, 478. 
Ploiaria, new species of, 65. 
Podargus, new species of, 287. 
Polycera, on the development of the ova 
of, 377. 
Polydrosus, on the British species of, 16. 
Potato, on the natural habitat of the, and 
on its introduction into Europe, 154; 
on the disease of the, 275, 294, 375. 
Prinopleura, new species of, 58. 
Psammogeton, characters of the genus, 
51. 
Psilonotus, new species of, 113. 
Pteromalus, new species of, 270. 
Quatrefages, M. de, on the red colour of 
the blood in Planorbis, 454. 
Quekett, J., on the intimate structure of 
bone, 374. 
Récluz, C. A., on new species of Nerita, 
292, 362; on a new species of Cono- 
vulus, 295. 
Reduviide, descriptions of new, 65. 
Reeve, L., on new species of shells, 129, 
290, 363, 478. 
503 
Reid, Dr. J., on the development of the 
a of the nudibranchiate mollusca, 
Respiration, on the mechanism of, 448. 
Rosellinia, characters of the genus, 226. 
Royal Institution, proceedings of the, 197. 
Royal Society, proceedings of the, 447. 
eo synopsis of the British, 165, 235, 
Salticns, new species of, 34. 
Saunders, W. W., on some new Crypto- 
cephalides, 58. 
Scelio, new species of, 185. 
Schaphespermum, characters of the ge- 
nus, 51. 
Scladerma, new species of, 272. 
spe oo igi on the habits of the, 65, 
Scouler, Dr. J., on some rare species of 
a found on the coasts of Ireland, 
sng a History of British, noticed, 
Semnopithecus, description of a new spe- 
cies of, 335. 
Shells, new, 129, 133, 288, 290, 295, 362, 
363, 431, 441, 478. 
Sibson, F., on the mechanism of respira- 
tion, 448. 
Sicily, on the flora of, 124. 
Sitona, on the British species of, 227. 
Smith, F., on the habits of Odynerus An- 
tilope, 60. 
Spain, on the flora of, 115, 187, 263. 
Spermatozoa of the polar bear, observa- 
tions on the, 494. 
Spheriaceze, observations on the tribe, 
with descriptions of new genera, 217. 
Spiders, descriptions of new, 30, 76. 
Starch, on the formation of, 73, 185. 
ay characters of the new genus, 
ce Seepiammae characters of the genus, 
Stigmodera, new species of, 62, 65. 
Stiliger, characters of the new genus, 3. 
Stocks, Dr. J. E., notes on the botany of 
Seinde, 419... 
Strepera, new species of, 492. 
Streptolirion, characters of the new ge- 
nus, 51. 
Strix, new species of, 126. 
—e on the British species of, 
305. 
Sula, new species of, 493. 
Swintonia, characters of the genus, 362. 
Sylochelidon, new species of, 493. 
eno: characters of the new genus, 
Templeton, Dr., on the habits of the Sco- 
lopendre, 65, 495. 
