4€7 



INDEX TO VOL. X, 



Adams, Messrs. H. and A., on a 



new arrangement of the British 

 Rissoae, 358. 



Alexander, Dr. R. C, on the leaf o 

 Guarea grandifolia, 224. 



Algae, on the formation of swarming- 

 cells in the, 401 . 



Anderson, T., on the composition of 

 the fluid from the leavesof Gram, 64. 



Animals, marine, observations on 

 keeping, alive in unchanged sea- 

 water, 263. 



Anniella, characters of the new genus, 

 440. 



Anser brachyrh5Tichus, notice con- 

 cerning, 74. 



Ant, on a new species of, 441. 



Anthophorabia, observations on the 

 genus, 303. 



Aptychus, observations on, 355. 



Aquilaria Agallocha, on the, 221 . 



Arachnida, on the circulation of the 

 blood in the, 160. 



Araneidea, on some newly discovered 

 species of, 93 ; on the British spe- 

 cies of, 182, 248. 



Arenaria serpyllifolia, on a monstrosity 

 of, 316. 



Argonauta, new species of, 365. 



Arnaud, M., on the Tsetse of Southern 

 Africa, 464. 



Arremon, new species of, 364. 



Arvicola, new species of, 444. 



Atelides, description of the new ge- 

 nus, 360, 436. 



Babington, C. C, on a supposed new 

 species of Eleocharis, 19; on the 

 Orchis speciosa of Host, 65. 



Baird, Dr. W., on several new species 

 of Entomostraca, 56. 



Balseniceps, description of the genus, 

 366. 



Bate, C. S., on some British Crustacea, 

 356. 



Bdellium, notes on, 222. 



Belemnite, on the structure of the, 

 14, 158; on a new species of, 355. 



Belemnoteuthis, observations on the 

 genus, 18. 



Benson, W. H., on the genus Cyclo- 

 stoma, with descriptions of new 

 species, 268 ; on an Australian Di- 

 plommatina, and on some new East 

 Indian Hehcidae, 348. 



Berkeley, Rev. M. J., on the occur- 

 rence of an eatable Nostoc in the 

 Arctic regions and in the moun- 

 tains of Central Asia, 301 . 



Birds, on the migration of, 285 ; de- 

 scriptions of new, 366, 449. 



Blackwall, J., on some newly dis- 

 covered species of Araneidea, 93 ; 

 catalogue of British spiders, 182, 

 248. 



Blanchard, E., on the circulation of 

 the blood in the Arachnida, 1 50. 



Books, new : — Pritchard's History of 

 Infusorial Animalcules, 134 ; Lea*s 

 Synopsis of the Family of Naiades, 

 136 ; Horsfield's Plantae Javanicse 

 Rariores, 213 ; Rymer Jones's Na- 

 tural History of Animals, 362 j; 

 Smith's Park sand PleasureGrounds, 

 363 ; Guerin-Meneville's Revue et 

 Magasin de Zoologie, 364, 440. 



Botanical Society of Edinburgh, pro- 

 ceedings of the, 62, 228. 



Bowerbank, J. S., on the Pterodactyles 

 of the chalk formation, 372. 



Brachiopoda, on some new, 421. 



British Museum, natural-history col- 

 lections at the, 392. 



Bryant, G., on the late appearance of 

 the Swallow, 465. 



Busk, G., on the priority of the term 

 Polyzoa for the Ascidian Polypes, 

 352. 



Callimorae, new species of, 47. 



Campanulariadae, on the reproduction 

 of the, 81. 



Candona, new species of, 56. 



Capulus ?, new species of, 190. 



Carduelis spinus, notice concerning, 7 1 • 



Carter, H. J., on the form and struc- 

 30* 



