INDEX. 



507 



Milne-Edwards, A., on the trans- 

 formation of the ocular peduncle 

 into an antenna in a species of 

 Palinurus, 360. 



Mitromorpha, new species of, 182, 

 322. 



Modiola, new species of, 178. 



Moera, new species of, 491. 



Morch, M., on the Serpulidoe, 484. 



Miiller, Dr. F., on a new genus of 

 Amphipod Crustacea, 276 ; on the 

 development of Crustacea, 410. 



Mus, new species of, 71. 



Myriosteon Higginsii, observations 

 on, 61. 



Myurella, new species of, 395. 



Nannastacus, description of the new 

 genus, 86. 



Navicula, on conjugation in some 

 species of, 161. 



Nesotragus, new species of, 360. 



Newton, A., on the zoology of Spits- 

 bergen, 423. 



Nicea, characters of the new genus, 

 36. 



Norman, Rev. A. M., on the genera 

 and species of British Echinoder- 

 mata, 98 ; on an undescribed genus 

 of British Hydrozoa, 261. 



Nucleolites, new species of, 498. 



Nycticejus, new species of, 436. 



Ochralea, characters of the genus, 

 144. 



Odostomia, new species of, 29, 395. 



(Edecerus, new species of, 146. 



CEdocephalum, new British species 

 of, 403. 



Oligodon, new species of, 91. 



Opalia, new species of, 31, 397. 



Ophidium imberbe, observations on, 

 40. 



Oreaster armatus, observations on, 

 433. 



Oregonia, new species of, 487. 



Ostrich, on the muscular mechanism 

 of the leg of the, 262. 



Owen, Prof., on the marsupial pouches, 

 mammary glands, and foetus of the 

 Echidna hystrix, 419. 



Palinurus, on the metamorphoses of, 

 237 ; on the transformation of the 

 ocular peduncle into an antenna in 

 a species of, 360. 



Paludinella, new species of, 28. 



Parker, W. K., on the nomenclature 

 of the Foraminifera, 225. 



Pecten, new species of, 17^. 



Petalocerus, new species of, 490. 



Peters, Dr., on a new species of Lep- 

 tocephalus, 48 ; on the milk-den- 

 tition of the Walrus, 355 ; on the 

 cervical vertebrae of Choloepus 

 Hoffmanni, 359 ; on viviparous 

 Fishes of the genus Hemirhamphus, 

 500 ; on a new species of Basse, 

 503. 



Peziza, new British species of, 445. 



Phago, description of the new genus, 

 209. 



Phasianella, new species of, 179. 



Phyllosoma, observations on the spe- 

 cies of, 237. 



Phytophaga, descriptions of new ge- 

 nera and species of, 33, 139. 



Pinnularia gibba, on conjugation in, 

 161. 



Plagiodera, new species of, 36. 



Plants, on raphides and other crys- 

 tals in, 38, 211, 380, 456. 



Platycarcinus, new species of, 488. 



Plectostoma, description of the new 

 genus, 177. 



Plesiosaurus, on a new species of, 49, 

 2.32. 



Pleuronectidae, on the obliquity of 

 the, 361. 



Polemon, new species of, 90. 



Pollock, F., on the history and ha- 

 bits of the Epeira Aurelia, 459. 



Polyporus, new British species of, 

 319. 



Psammophis, new species of, 95. 



Pterodactyles, on the literature of 

 the Enghsh, 148. 



Ptychochoerus plicifrons, observations 

 on, 80, 154. 



Pugettia, new species of, 486. 



Raphides, observations on, 38, 211, 

 380, 456. 



Reptiles of British India, remarks on 

 Dr. Giinther's work on, 416. 



Rhizopoda, on the fresh- and salt- 

 water, of England and India, 277. 



Rhodona punctata, on a new variety 

 of, 240. 



Rhombopala, new species of, 143. 



Rhynchoprion penetrans, observations 

 on, 293. 



Rhyparida, new species of, 141. 



Rink, O., on watercourses under the 

 inland ice in Greenland, 475. 



Rissoina, new species of, 399. 



