504 



INDEX. 



Trichomaplata, cliiiracters of the ge- 

 nus, 134. 



Trigona, on the velvet-like periostraca 

 of, 143. 



Trigonia, monograph of the recent 

 species of, 148 ; new species of, 

 421, 422, 425. 



Trilobites, on a new classification of 

 the, 228. 



Triomphalia, characters of the new 

 genus, 300. 



TrocliilidfE, on two new species, with 

 the characters of a new genus of, 

 60. 



Trochotoma, new species of, 417- 



Trochus, new sjjecies of, 416. 



Truncatella, observations on the Bri- 

 tish species of, 451. 



Tu]>aia, on a new species of, 135. 



Turbo, new species of, 416. 



Turner, H. N., on the evidences of 

 attiuity afforded by the skull in the 

 ungulate mammalia, 4/7. 



Tvler, Lieut., on the serpents of St. 

 'Lucia, 130. 



Ursus babella, notice respecting, 230. 



Vegetation, chronological exposition 

 of the periods of, 73, 192, 348. 



Vibrio Graminis, observations on, 182. 

 Victoria Regia, remarks on the, 146, 



303,310,491. 

 Vital and physical forces, reciprocal 



relation of the, 370. 

 Vitrina, new species of, 297. 

 Walckenaera, new British s])ecies of, 



340. 

 Walker, F., on Aphides, 41, 118. 

 Walker- Arnott's, G. A., British Flora, 



reviewed, 3/9 ; on some British 



plants, 472. 

 Watevhouse, G. R., on a new species 



of Tupaia, 135. 

 Wing, W., on three new genera and 



species of Lepidoptera, 134. 

 Wollaston, Mr., on the tenacity of life 



in snails, 489. 

 Woods', J., Tourist's Flora, reviewed, 



122. 

 Woodward, S. P., on the tenacity of 



life in snails, 489. 

 Yunx, new species of, 14L 

 Zoolooieal Societv, proceedings of the, 



51,1.^0, 212, 291, 386, 477- 

 Zoophytes, on three new Devonian, 



377.' 



END OF THE SIXTH VOLT^ME. 



PIIINTF.D EY RICMAHD AND JOHN I",. TAVLOR, 

 KF.P HON COURT, FLEET STUEET. 



