INDEX. 



543 



Polygastrica, on the sacculi of the, 438. 



Porcellana, on the Irish species of, 103. 



Poteriocrinidse, new species of, 195. 



Pritchard's, A., History of Animalcules, 

 notice of, 140. 



Promeces, new species of, 368. 



Pselapliidae, descriptions of new, 319. 



Psittacidae, on a new genus of, 527. 



Pteromalus, new species of, IIC, 184,186. 



Ptilinopus, descriptions of two new species 

 of, 145. 



Quekett, E. J., on the nature of the ergot, 

 461. 



Radiata, notice respecting a new genus of, 

 299. 



Rainey, Mr., on the cause of the ascent 

 and motion of the sap, 379, 383. 



Ralfs, J., on Homoeocladia anglica, 77 ; on 

 the species of Desmidium, 372 ; on the 

 genus Sphseroplea, 434 ; on the Diato- 

 maceae, 447. 



Ranella, new species of, 255. 



Ray, J., letters from, to Sir Hans Sloane, 

 485. 



Redfield, W. C, on some ichthyolites, 513. 



Reduviidae, descriptions of new, 466. 



Reeve, L., on the pearly nautilus, 119; 

 monograph of Crassatella, 302 ; on new 

 shells", 308, 313; on the genus Torna- 

 tella, 387 ; on two new species of Onis- 

 cia, 475 ; on some new species of Del- 

 phinula, 521 ; on a new species of Mu- 

 rex, 523. 



Report on the Invertebrata of Massachu- 

 setts, reviewed, 54. 



Reptiles, new species of, 46 ; on the blood- 

 corpuscles of the, 525. 



Rhipicera, new Australian species of, 66. 



Rhodocrinites, new species of, 202. 



Rhombus, new species of, 495. 



Richardson, J., on the distribution of some 

 American birds, 484 ; on the ichthyo- 

 logy of Australia, 22, 169, 352, 422, 489. 



Ring-dove, on the history and habits of 

 the, 283. 



Rook, on the history and habits of the, 275. 



Ross-shire, account of a botanical excur- 

 sion in, 319. 



Royal Society, proceedings of the, 378. 



Royal Society of Edinburgh, proceedings 

 of the, 70, 157, 384. 



Ryania, new species of, 15. 



Salamander, aquatic, on the nervous and 

 circulating systems of the, 290. 



Salictum Britannicum Exsiccatum, noticed, 

 301. 



Salmon, on the growth of the, 157, 384, 

 409. 



Salmonidae, embryology of the, 49, 384. 



Sap, on the cause of the ascent and motion 

 of, 379, 383. 



Sarcina, description of the new genus, 

 126. 



Saunders, W. W.,on the Chrysomelidse of 

 New Holland, 59, 66 ; on Depressaria 

 Gossypiella, 316 ; on new Australian 

 Chrysomelidse, 317. 



Saurian dermal plates, occurrence of, in 

 the Wealden of the Isle of Wight, 5. 



Saw-fly, observations on the habits of a, 

 241, 376. 



Saxifraga stellarisand S. leucanthemifolia, 

 notice respecting, 483. 



Scomber, new species of, 23. 



Sea-Cup, observations on the, 28. 



Sea-Urchin, on the structure of the, 129. 



Secale cornutum, observations on, 236. 



Seriola cultrata, description of, 169. 



Shafter's, Dr., Climate of South Devon, re- 

 viewed, 295. 



Shaw, J., on the growth and migration of 

 the sea-trout, 384. 



Shells, descriptions of new, 16, 255, 308, 

 311,313,466,537; on the structure of, 

 155. 



Shetland, on the botany of, 70. 



Shuckard, Mr., on the parasitic habits of 

 Nomadas, 69. 



Sicily, notes on the botany of, 338. 



Silphodes, new species of, 315. 



Siphonaria, new, 308. 



Sipunculidse, observations on, 134. 



Sloane, Sir Hans, letters from, to J. Ray, 

 485. 



Smith, F., on new British species of Hy- 

 laeus, 60 ; on the habits of the Nomadae, 

 68. 



Smith's, Lieut.-Col. C. H., Mammalia, re- 

 viewed, 56. 



Sowerby, G. B., on new species of Cyclo- 

 stoma, 466. 



Sphaeroplea, observations on the genus, 

 434. 



Spiders, on an ichneumon parasitic on, 1 ; 

 on defective and redundant organiza- 

 tion in, 165. 



Squirrels, new species of, 533. 



Starfish, on a new British species of, 280. 



Starfishes,HistoryofBritish, reviewed, 127. 



Stenhouse, J., on the presence of theine 

 in Ilex Paraguyensis, 237. 



Sternodonta, new species of, 368. 



Stevenson, Mr., on an apparatus for catch- 

 ing insects by lamp-light, 66. 



Storer, Dr. H., on the discovery of an elec- 

 trical fish on the American coast, 326. 



Striatella, on the British species of, 455. 



Strickland, H. E., on Siberian birds de- 

 scribed by Latham, 113; on the no- 

 menclature of some Australian birds, 

 333 ; on some concretions in the ter- 

 tiary bed of the Isle of Man, 507 ; on 



