480 



INDEX. 



of, 101 ; on the structure of, 



253. 

 Stvlacodon, description of tlie genus, 



167. 

 Synclysmus, characters of the new 



genus, 242. 

 Synopella, description of the genus, 



129. 

 Systropha, new species of, 353. 

 Tachycellus, new species of, 459. 

 Taeniocampa, new species of, 362. 

 Tanais, new species of, 417. 

 Tanaorhinus, new species of, 438. 

 Tephrosia, new species of, 372. 

 Teredus, new species of, 462. 

 Thalera, new species of, 437. 

 Theridiosoma, characters of the new 



genus, 193. 

 Thomas, O., on Kerr's translation of 



the ' Systema Naturae' of Linnaeus, 



396. 

 Thomson, G. M., on additions to the 



Amphipodous Crustacea of New 



Zealand, 329; on two new Isopods, 



415 ; on a new species of Nehalia, 



418. 

 Thyris, new species of, 367. 

 Tintinnus semiciliatus, description 



of, 290. 

 Trapezites, new species of, 232. 

 Traquair, Dr. R. H., on the affinities 



of the Platysomidse, 471. 

 Trichinosis in a hippopotamus, on, 



99. 

 Trigonothir, new species of, 4. 

 Triphsenopsis, new species of, 361. 

 Tropaea, new species of, 355. 



Trotosema, description of the new 



genus, 448. 

 Tyiocarcinus, characters of the genus, 



14. 

 Vaillant, L., on the oviposition of 



the Amblystomes, 248. 

 Valgus, new species of, 83. 

 Vectisaurus valdensis, note on, 167. 

 Vertebrates, on the occurrence in 



North America of rare extinct, 



found fragmentarily in England, 



53. 

 Vesperugo, new species of, 135. 

 Viguier, C, on the organization of 



Batrachobdella, 250. 

 Volvocineae, on the systematic posi- 

 tion of the, 170. 

 Wagner, N., on the structure of the 



cephalic ganglia of insects, 397. 

 Walckenaera, new species of, 203, 



347. 

 Waterhouse, C. O., on new Ceto- 



niida?, 74, 247. 

 Wood-Mason, J., on a new genus of 



Phasmidae, 386. 

 Woodward, Dr. H., on Squilla We- 



therelli and Necroscilla Wilsoni, 



319. 

 Xuthia, new species of, 462. 

 Xylina, new species of, 365. 

 Xylophasia, new species of, 359. 

 Ypthima, new species of, 229. 

 Zoantharia malacodermata of the 



shores of Marseilles, on the, 325. 

 Zittel, K. A., on the fossil Calci- 



spongiae, 61, 120. 



END OF THE FOURTH VOLUME. 



PRINTED BY TAYLOR AND FRANCIS, 



UED MON COURT, FLEET STREET. 



