543 



INDEX TO VOL. XX. 



AcTiNOTE, new species of, 119. 



^geria, new species of, 83. 



yEinene, new species of, 309. 



^tliop_yga, new species of, 537. 



Alcyonidium, new species of, 217. 



Alpenus, new species of, 89. 



Aniazilia, new species of, 404, 



Ancistrocampta, new species of, 324. 



Annelids, on the embryology of, 365. 



Antillia, new species of, .309. 



Aplmseus, new species of, 51. 



Appias, new species of, 48. 



Arachnidium, new species of, 216. 



Archimantis, new species of, 7G. 



Aroa, new species of, 402. 



Artaxa, new species of, 344, 402. 



Asteracanthion, new species of, 455. 



Atbyma, new species of, 47. 



Atthey, T., on the structure of the 

 lower jaw in Rhizodopsis and 

 E-hizodus, 129 ; on Pteroplax cor- 

 nuta, 369. 



Aulopus, new species of, 444. 



Bacteria, new species of, 74. 



Balfena tarentina, observations on, 

 328. 



Baly, J. S., on new genera and spe- 

 cies of Phytophagous Beetles, 377. 



Barrois, C, on the embryology of 

 Annelids, 365. 



Bathythrissidje, characters of the 

 new family, 443. 



Batrachostomus, new species of, 178. 



Belenois, new species of, 356. 



Belippa, new species of, 348. 



Bellesme, Jousset de, on the meta- 

 morphosis of Libellula depressa, 

 447. 



Bellidia, description o^ the new 

 genus, 313. 



Bennett, Dr. G., on the Pearly Nau- 

 tilus, 331. 



Birds, on the diptribution of, in North 

 Russia, 1, 180, 41)4 ; new, 94, 169, 

 171, 178,404,519,533. 



Bireta, new species of, 473. 



Boarmia, new species of, 358. 



Book, new: — Researches on the 

 Extinct Mammals of Australia, 

 359. 



Brown, J. A. 11., on the distribution 

 of Birds in North Russia, 1, 180, 

 494. 



Briiggemann, Dr. F., on a new spe- 

 cies of Batrachostomus, 178; on 

 the genus Pceoptera, 244 ; on 

 Stony Corals, 300. 



Brvozoa, on the organization of the, 

 540. 



Buccinum Belcheri, on a variety of, 

 134. 



Bucorvus, new species of, 171. 



Butler, A. 6., on Peruvian Lepido- 



})tera, 117 ; on Lepidoptera from 

 jifu, 348 ; on Heterocera from 

 Japan, 393, 473. 



Caligula, new species of, 479. 



Callithea, new species of, 123. 



Callodictyon, characters of the new 

 genus, 513. 



Cambridge, Rev. O. P., on new and 

 little-known spiders from the Arc- 

 tic regions, 273. 



Capellini, Prof, on the capture of a 

 right Whale in the MediteiTanean, 

 328. 



Cardiastethus, new species of, 111. 



Carpenteria monticularis, olsserva- 

 tious on, 68, 175. 



Carter, H. J., on arctic and antarctic 

 sponges, 38 ; on the branched form 

 of the apertural prolongation fi-om 

 the summit of Carpenteria monti- 

 cularis, 68, 175; on Gypsina melo- 

 besioides, 172; on a fossil species 

 of sarcohexactinellid sponge, 176; 

 on Wyvillethomsonia Wallichii 

 and Squamulina scopula, 337 ; on 

 a new species of roraminifera, 

 470. 



Ceira, new species of, 91. 



Centrophorus, new species of, 433. 



Cerura, new species of, 89, 474. 



Ceyx, new species of, 633. 



