400 



INDEX to VOL. XI 



Acanthostpheia, new species of, 



203. 



Acanthozone, new species of, 205. 



Acentrotremites, description of the 

 new genus, 232. 



Aclis, new species of, 396. 



Actinophrys sol, on processes of fu- 

 sion in, 321. 



Actinosphserium Eicliliornii, obser- 

 vations on, 296. 



Adeorbis, new species of, 399. 



Agrotis, new species of, 53. 



Akysis, new species of, 138. 

 Alcides, new species of, 124. 

 Alcyoniuin, new species of, 251. 

 Alliospora, note on the new genus, 

 282. 



Amarygmus, new species of, 441. 



Amathillopsis, new species of, 205. 



Amoeba, new species of, 275. 



Amphialus, characters of the new 

 genus, 127. 



Amphirjoda of the ' Challenger ' ex- 

 pedition, on the, 203. 



Andania, new species of, 206. 



Anodonta fluviatilis, on the parasites 

 of, 391. 



Anthracias, new species of, 439. 



Anthrenus, new species of, 61. 



Ant-Lion, on the habits of the, 288. 



Aphis of the red galls of Ulmus cam- 



pestris, on the migrations of the, 

 144. 



Apion, new species of, 122. 



Apoderus, new species of, 122. 



Appias, new species of, 421. 



Archer, Dr., on new species of Cos- 

 marium, 208, 215; on a new 

 species of Xanthidium, 285 ; on a 

 locomotive state of Bacterium ru- 

 bescens, 210. 



Asterias, new species of, 385. 



Astrocrinus, observations on the 

 genus, 234. 



Astura, new species of, 428. 



Atax ypsilophorus, observations on, 

 391. 



Bacterium rubescens, on a locomo- 

 tive state of, 210. 



Balbiani, M., on the polar cells of 

 insects. 64. 



Bathybiaster, description of the new 



genus, 386. 



Bell, Prof. F. J., on the generic and 

 specific characters of the Laga- 

 nidae, 130; on a Peripatus from 

 the island of Dominica, 388. 



Biological lectures, lantern-slides for, 

 150. 



Blanchard, R., on the chromato- 

 phores of the Cephalopoda, 292. 



Blastoidea, on the morphology of 



the, 225. 



Books, new : — Wilder and Gage's 

 Animal Technology as applied to 

 the Domestic Cat, 142 ; Den Norske 

 nord-havs-expedition 1876-1878. 

 Mollusca. I. Buccinidae, ved II. 

 Friele, 216 ; Graft's Monograph of 

 the Turbellarians, 287 ; GritHths's 

 Micrographic Dictionary, 376 ; Sal- 

 vias Catalogue of the Strickland 

 Collection of Birds, 377; Van 

 Bemmelin's Over den bouw der 

 Schelpen van Brachiopoden en 

 Chitonen, 379; Cassell's Natural 

 History, 451 ; Quenstedt's Amrno- 

 niten des schwabischen Jura, 

 455. 



Boulenger, G. A., on little-known 

 species of Frogs, 16; on new 

 genera of Coeciliae, 48, 202 ; on a 

 new genus of Geckos, 174 ; on new 

 species of Lizards and Frogs from 

 Mexico, 342. 



Brachiopods, on the structure of the 

 shells of, 379. 



Bradymenis, new species of, 437. 



Brahmea, new species of, 114. 



Brongniart, C, on a new fossil or- 



thopterous insect, 71. 

 Brooks, W. K., on the metamorphosis 



of Penseus, 147 ; on the origin of 

 alternation of generations in Hy- 

 dro-Medusae, 458. 



Brugnonia, description of the new 

 genus, 398. 



Bufo punctatus, observations on, 19. 



Butler, A. G., on new Lepidoptera, 

 109, 277 ; on the ' Challenger ' 

 Lepidoptera, 402 ? 



Carcharias, new species of, 137. 



