INDE X. 
eae) characters of the new genus, 
29. 
a eral, remarks on the order, 
45. 
Pholiodotus, new species of, 209. 
Physorhinus, new species of, 25. 
Phytelephas macrocarpa, notice respect- 
ing the, 130, 
Picus, new species of, 48, 229. 
Piscicola, new British species of, 441. 
Planaria, descriptions of new British spe- 
cies of, 437. 
Plants, on the endemic distribution of, 
126; rare British, notices respecting 
the habitats of, 141; from the shores 
of Davis’s Straits, observations on, 166. 
asin characters of the new genus, 
317. 
Pnoepyga, new species of, 195. 
Podabrus, new species of, 427. 
Pollicita, characters of the new genus, 4. 
Polynoé cirrata, on the development of, 
183 
Polypes, anatomical and physiological 
observations on some, 385. 
Potatoes, on the disease of, 358. 
Pycnonotus, new species of, 228. 
Pyctoris, characters of the genus, 194. 
Pyrrhulinota, new species of, 206. 
Ralfs, J., on the British Desmidiex, 10; 
on the British Diatomacee, 109; on 
the genera Spirulina and Coleochete, 
308. 
Rallus, new species of, 230. 
Rana aquensis, description of, 352. 
Ranunculus Lenormandi, notice respect- 
ing, 141. 
Reade, Rev. J. B., on the cilia and ciliary 
currents of the oyster, 124. 
Reeve, L., on some new species of Mitra, 
257 ; on the dissolution and re-calcifi- 
cation of the shell in Cyprea, a genus 
of pectinibranchiate mollusea, 374. 
Reid, Prof. J., anatomical and physiolo- 
gical observations on some zoophytes, 
385. 
Richardson, Dr., on the ichthyology of 
China, 123. 
Royal Society, proceedings of the, 131. 
Rubus, description of a new species of, 
114; remarks on some forms of, 361. 
Saccopteryx, observations on the genus, 
279. 
Sagitta bipunctata, anatomical and phy- 
siological observations on, 289. 
Salmon, on the migrations of, 141. 
Salter, T. B., on some forms of Rubus, 
361. 
Salwey, Rey. T., list of the lichens found 
in the neighbourhood of Oswestry and 
Ludiow, 90. - 
471 
Saperda, new species of, 209. 
Sars, M., on the occurrence of an intesti- 
nal worm in an acaleph, 88; on the 
development of the Annelides, 183. 
Saxifraga Geum, notice respecting a mon- 
strosity occurring in, 125. 
es Irish, notice respecting the, 
Sceliages, new species of, 275. 
Sr eee observations on the group, 
Schomburgk, Sir R., on the Murichi or 
Ita palm of Guiana, 125. 
Schrenk, Dr., explorations of, 355. 
Schulz, Dr. F., on the microscopic con- 
stituents of the ash of fossil coal, 69. 
Scolex Acalepharum, observations on, 88. 
Scotobius, new species of, 319. 
Scymnus, new species of, 41. 
Sebasteos, on a new species of, 275. 
Sedgwick, Prof., on the fossiliferous slates 
of North Wales, 135. 
Selenophorus, new species of, 22. 
Seller, Dr. W., on some plants obtained 
from the shores of Davis’s Straits, 166. 
Shadbolt, G., on a British species of 
Ixodes found upon cattle, 64. 
Shells, new, 56, 58, 61, 128, 253, 332, 
336, 341, 356. 
Spain, observations on the flora of, 113, 
189, 248. 
pp imewrras on the British species of, 
3. 
Sphenceacus, new species of, 63. 
Spinther, characters of the genus, 8. 
Spirulina, on the British species of, 308. 
Spongiadz, descriptions of some new 
genera of, 400. 
ee Lieut., on the geology of Lycia, 
36. 
Stachyris, characters of the genus, 193. 
Stark, Dr. J., on Tetrao medius, 57. 
Stematumenia, characters of the new 
genus, 406. 
Sterna, new species of, 346. 
Sterope, new species of, 325. 
Stomion, description of the new genus, 
Taphozous, new species of, 55. 
Tarsiger, characters of the genus, 198. 
Temnoris, new species of, 202. 
Tetrao medius, notice respecting, 57. 
Tetrastoma, observations on, 88. 
Thaumantis, new species of, 234, 
Theron, new species of, 230. 
Thinobatis, new species of, 320. 
Thompson, W., on Larus capistratus, 357; 
on the occurrence of the belted king- 
fisher, Aleedo Alcyon, Linn., in Ire- 
land, 450; on fossil infusoria of the 
county of Down, 218. 
