INDEX. 



495 



Nematode worms, on the retrograde 

 metamorphosis of certain, 4.91. 



Neriene, new British species of, 436. 



Nerita, new species of, 288. 



Newton, A., on some hybrid ducks, 

 138; on a new species of GaUinula, 

 417. 



Norman, Rev. A. M., on an Echiuo- 

 derm new to science, 112 ; on the 

 discovery of Physa acuta in Eng- 

 land, 114. 



Notiomimus, description of the new 

 genus, 15. 



Nucula, new species of, 120. 



Nudibranchiate MoUusca, on some 

 points in the economy of the, 33. 



Odontophorus, new species of, 149. 



Odostomia, new species of, 42, 298. 



Osti'ca, new fossil species of, 117. 



Ovis Pohi, note on, 227. 



Owen, Prof., on the cerebral charac- 

 ters of Man and the Ape, 456. 



Oxybeles gracilis, on the habits of, 

 340. 



Parthenia, new species of, 42. 



Pasteur, L., on the mode of nutrition 

 of the Mucedineae, 151; on infuso- 

 rial animalcules living without free 

 oxygen, 343. 



Patellaria, new British species of, 

 450. 



Paussus lineatus, on the identit}" of, 

 with P. Parrianus, 459. 



Pecten, new s])ecies of, 118. 



Peltogaster, observations on the ge- 

 nus, 47. 



Perna, new species of, 121. 



Peronospora, new species of, 449. 



Peters, Dr. W., on Taphrometopon 

 lineolatum, 481. 



Peziza, new British species of, 449. 



Phacidium, new species of, 451 . 



Phalangiidse, on the British species of, 

 353. 



Phaleria, new species of, 246. 



Pholadomya decussata, on a variety 

 of, 122. 



Physa acuta of Draparnaud, on the 

 occurrence of, in England, 114. 



Pithecia, new species of, 152. 



Plcctopylis, note on a species of, 244. 



Pleurotomaria, new species of, 291. 



Polyporus,new British species of, 379. 



Polythalamia, on the organization 



and reproduction of the, 306. 

 Pseudostene, description of the new 

 genus, 247. 



Pteroceras, new species of, 281. 



Pterocyclos, on the animal of, 196. 



Pterodonta, new species of, 282. 



Pupinella, on the animal of, 196. 



Pyramidelhdaj, on new species of, 

 from Japan, 41, 295. 



Pyrula, new species of, 283. 



Reeve, L., on the history, synonymy, 

 and geographical distribution of 

 the recent Terebratnlae, 169, 443^ 

 on the synonymy of the species of 

 Cymbium, 268. 



Reinhardt, Prof., on the affinities qf 

 Balaeniceps, 144. 



Reptiles from Bahia, on some, 412." 



Rhinocyllus, new species of, 102. 1 j, 



Rhizoctonia, new British species ot>. 

 455. 



Rhizopoda, on the reproductive ele-. 

 ments of the, 360. 



Royal Society, proceedings of thii^. 

 322, 407. 



Rusi japonica, on the, 142. 



Sacculina Carcini, observations on, 4B. 



Salvin, O., on new reptiles from Gua- 

 temala, 325. 



Saturnia, on a hybrid, 150. 



Scalaria, new species of, 286. 



Schultze, Prof. M., on the genus Cor- 

 nuspira, and on the organization 

 and rejn-oduction of the Polythala- 

 mia, 306. 



Sciurus, new species of, 4f)0. 



Sclater, Dr., on the Rusa japonica, 

 142; on the Ovis Polii of Blyth, 

 227 ; on new species of American 

 birds, 327; on new sjjecies of He- 

 teropelma, 487. 



Seele}', H., on some new upper 

 greensand bivalves, 116; on the 

 red limestone of Hunstanton, 

 233 ; on new Gasteropods from the 

 up])er greensand, 281 ; on a new 

 order of Echinoderms, 365. 



Seila, description of the new sub- 

 genus, 131. 



Septonema, new British species of, 

 381. 



Septoria, new British species of, 380. 



Sipunculi, on the anatomy of the, 486. 



Solarium, new species of, 286. 



Spha^ria, new British species of, 452. 



Spiders, new, 20, 353, 428. 



Stagetus, description of the new ge- 

 nus, 11. 



Stimpson, W.jon the genus Bipalium, 

 231. 



