504 



INDEX. 



Trichomaplata, characters 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. 

 Trochihdse, on two new species, with 



the characters of a new genus of, 



60. 

 Trochotoma, new species of, 417- 

 Trochus, new species of, 416. 

 Truncatella, observations on the Bri- 

 tish species of, 451. 

 Tupaia, on a new species of, 135. 

 Turbo, new species of, 416. 

 Turner, H. N., on the evidences of 



affinity afibrded by the skull in the 



ungulate mammalia, 477. 

 Tyler, 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, 14 G, 



303,310,491. 

 Vital and physical forces, reciprocal 



relation of the, 370. 

 Vitrina, new species of, 297. 

 Walckenaera, new British species of, 



340. 

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

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



reviewed, 379 ; on some British 



plants, 472. 

 Waterhouse, 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, 141. 

 Zoological Society, proceedings of the, 



51, 130, 212, 291, 386, 477. 

 Zoophytes, on three new Devonian, 



377. 



END OF THE SIXTH VOLUME. 



PRINTED BY RICHAKD AND JOHN E. TAYLOR, 

 RED LION COURT, FLEET STHEET. 



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