499 



INDEX TO VOL. XV. 



AcRyEA, new species of, 386. 

 Acteon viridis, notice respecting, 327. 

 iEgidium, new species of, 440. 

 iEgotheles, new species of, 132. 

 Agaricus crinitus, obsen^ations on, 424. 

 Alder, J., on Euplocamus, Triopa and 



Idalia, 262. 

 Algae Hibernicae, noticed, 189. 

 Altensteinia, new species of, 385. 

 Amphidesma, new species of, 318, 434. 

 Amphitoe pelagica, description of, 75. 

 Anatifa sulcata, description of, 75. 

 Ancyloceras, new species of, 31 ; distri- 

 bution of the genus, 34. 

 Ancyra, characters of the new genus, 34. 

 Andropadus, new species of, 127. 

 Animal and vegetable kingdoms, on some 



important analogies between the, 210. 

 Animals, marine, notices respecting some, 



68. 

 Animals, on the means by which various, 



walk on the vertical surfaces of highly 



polished bodies, 115. 

 Anoplognathus, on a new species of, 38. 

 Anoplotherium, in the lowest layers of 



the tertiary period of the Paris basin, 



on the occurrence of, 141. 

 Aphaena, new species of, 37. 

 Apion,on the synonymy of the genus, with 



descriptions of new species, 331, 392. 

 Aplysia, new species of, 313. 

 Appendicula, new species of, 386. 

 Araneidea, on the structure, functions and 



economy of the, 221. 

 Area, new species of, 355. 

 Argynnis, remarks on the genus, 496. 

 Articulata, on the reproduction of lost 



parts in the, 373. 

 Asiphonia, characters of the new genus, 



192. 

 Asterina gibbosa, notice respecting, 330. 

 Austin, P., on the Ischadites Konigii, the 



Tentaculites and the Conularia, 406. 

 Avicennia, on the development of the 



ovulum in, 197. 

 Babington, C. C, on the correct nomen- 

 clature of Lastraea spinosa and L. mul- 



tiflora of Newman, 322. 

 Bacillaria;, on the vegetable nature of the, 



18b\ 



Bailey. Prof., on some infusorial deposits 

 in America, 214. 



Bain, A. G., on the geology of the south- 

 eastern extremity of Africa, 138. 



Balanophoreae, observations on the, 193. 



Balfour, Prof., account of a botanical 

 excursion to the Mull of Cantyre and 

 island of Islay, 425. 



Ball, R., notice respecting the two-toed 

 sloth, 64 ; on the FeUs melanura, 286. 



Batrachospermum vagum, notice respect- 

 ing, 244. 



Belemnites, observations on some, 277. 



Beneden, P. J. van, on the genera Eleu- 

 theria and Synhydra, 244 ; on the em- 

 bryogeny of the Tubulariae, 346. 



Berkeley, Rev. M. J., on the preservation 

 of objects of natural history for the 

 microscope, 104; on Hsematococcus 

 sanguineus, 372 ; on Agaricus crinitus 

 and some allied species, 424. 



Birds, new, 125, 129, 132, 142,260,326, 

 360, 430; on the habits of some British, 

 166; of Ireland, 308 ; on the classifica- 

 tion of, 422. 



Bivalves, on the stone- and wood-bur- 

 rowing, 113. 



Black wall, J., on the means by which 

 various animals walk on the vertical 

 surfaces of highly polished bodies, 115 ; 

 ornithological notes by, 166 ; on the 

 structure, functions and ceconomy of 

 the Araneidea, 221. 



Blood-corpuscle, on the structure and 

 development of the, 281. 



Blood-corpuscles of the two-toed sloth, 

 on the, 122. 



Blytli, E., on some new species of Mam- 

 malia, 449. 



Bopyrus squillarum, description of, 75. 



Borlasia, new species of, 320. 



Botanical notices from Spain, 178, 417. 



Botanical Society of Edinburgh, proceed- 

 ings of the, 64, 350, 425. 



Botanical Society of London, proceedings 

 of the, 139. 



Botany, geographic memoirs on, 11, 89. 



Botany of the Voyage of H.M.S. Sulphur, 

 reviewed, 188. 



Bowerbank, J. S., on a new species of 



2 M 2 



