INDEX. 



4-71 



M'DonncU, Dr. K., on tlie electrical 

 nature of the power possessed by 

 the Actiniic, ."iOS. 

 Macroceplialus, ilescription of the 



new genus, Ml. 

 Malurus, new species of, lol. 

 Martens, Dr. K. von, on the occurrence 

 of marine auimal forms iu fresh 

 water, oO. 

 Masilevallia, new species of, S29. 

 Melanerpes, new sjK'cies of, ll?7- 

 Melanoptila, characters of tlie new 



penus, 3U(J. 

 Metealfeia, new species of. 111. 

 Miers, J., on the nature and origin of 

 the external coatings of seeds, 27G, 

 35" ; on the Canellace;e, 3-12. 

 Misoleptus, new species of, 21. 

 Mitvlia, description of the new genus, 



4'-10. 

 Mcibius, Dr. K.. on the natural his- 

 tory of the Pearl Oyster, and on 

 the |)roduetion of pearls, 81. 

 Mold, II. von, on the investigation of 

 vegetable tissue by the aid of po- 

 larized light, iy8,'2(J;3. 

 MoUusca, oceanic, notice of tw o new 



species of, 28. 

 Momotus, new species of, 153. 

 Moore, F., descriptions of three new 

 species of diurnal Lepidojjtera, 48. 

 Motacilla flava, note ou, 441. 

 Murray, A., ou Coleoptera received 



from Old Calabar, 12/. 

 Mus, new sjjccies of, 22!^. 

 Muscari, new species of, 209. 

 Mussel, common, on the habits of the, 



314. 

 Mustela, new species of, 80. 

 Mygale, ou the claws of the spiders 



of the genus, 159. 

 Mvricacea% on the structure and affi- 

 nities of, 100. 

 Ncmatoiilea, on the formation of the 



egg and fertilization in the, 1 75. 

 Neochloe, characters of the new ge- 

 nus, 239. 

 Neuropteris, on a remarkable fossil 

 specimen belonging to the genus, 

 232. 

 Nonagria, new species of, 117- 

 Novaculina, description of the genus, 



409. 

 Nyctophilus, monograph of the ge- 

 nus, 375. 

 Octomeria, new species of, 328. 



Odontophorus, new species of, 153. 

 Odostomia, new British species of, 



45. 

 (Kcophora, new species of, 121. 

 lEdogonium, on specific character, 

 fecundation, and abnormal develop- 

 ment in, 29. 

 Oncidium, new species of, 332. 

 Oolites, on the supposed formation of, 



79. 

 Orchids, new, 325. 

 Ortho|)tera, descriptions of new, 20. 

 Orthotrichcic, remarks on the sub- 

 order, .'J74. 

 Oscinis, new species of, 117- 

 Osteological Museum in Leyden, 400. 

 Owen, Prof., lectures on ])ala:onto- 



log>', 317, ^i^S, 45G. 

 Oyster, Cingalese Pearl, on the natural 



history of the, 81. 

 Pachyrhina, new species of, 115. 

 Palieontologv, Prof. Owen's lectures 



on, 317,388,456. 

 Palinurus, on the larva; of, 466. 

 Palmogla'a, on the propagation and 



development of, 5. 

 Paragus, new species of, 115. 

 Parrots, notes on some, 223. 

 Pasithea, description of the new ge- 

 nus, 427. 

 Pear, on the structure and develop- 

 ment of the flower and fruit of the, 

 238. 

 Pearls, on the production of, 81. 

 Peridinium, on the development of, 



259. 

 Perilitus, new species of, 23. 

 Petitia, new species of, 145. 

 Petrifaction, on the process of, 236. 

 Petroica, new species of, 151. 

 Pholcus, new species of, 432. 

 Phyllosoma, on the organization of 



the genus, 467. 

 Phytocoris, new species of, 124. 

 Pirates, new species of, 123. 

 Plants, new locahties for rare British, 



155, 375. 

 Platauea;, on the structure and affini- 

 ties of, 102. 

 Plesiosam-us, on a new species of, 



158. 

 Pleurothallis, new species of, 326. 

 Pleustes, description of the new ge- 

 nus, 362. 

 Pogouia, new species of, 335. 

 Poromya, new British species of, 42. 



