728 
Velletia, II, 3 4 . 
— excentrica, II, 37. 
Veloriia, II, 623, 63 o. 
Venericardia, II, 538 , C22. 
Venus, II, 622. 
Verena, II, 3 o 8 , 3 i 5 , 317, 3 1 8. 
— crenocariua, II, 3 1 0 , 3 i 5 . 
Veronicella, I, 671. 
— lævis, I, 681. 
VERTIGO, Müller, I, 314 , 699- 
— ovata, Say, I, 3 i 5 , 316, 680, 
681. 
— pellucida, I, 3 i 1. 
— pusilia, I, 3 i 4 . 
XANTHONYX, Crosse et Fischer, 1 , 
192, 198, 699 ; II, 673 , 681 . 
— Chiapensis, Pfeiffer, I, 203, 
5 77 . 
ZEBRA, Shuttleworth, I, 427, 436, 
43 7 , 441. 
— Mülleri , I, 44 i, 445 . 
ZoNIÏYALlNA , I, 169. 
— bilineata, I, 167. 
— Jalapensis, II, 663 . 
ZONITES, DenysdeMontfort, 1 , 142 , 
151 , 699; II, 6 7 3 . 
— algirus, I, i 42 . 
— bilineatus, Pfeiffer, I, 148, 
167. 
— caducus, Pfeiffer, I, 148, 162, 
163 ; II, 680 . 
— carinatus, Strebel, II, 663. 
INDEX ALPHABÉTIQUE. 
VERTIGO simplex, I, 3 i 5 . 
Vibex, II, 3 o 8 . 
— Schiedeana, II, 367. 
Videna Oajacensis, I, 2i5, 237. 
Villorita, II, 63 o. 
Vitrina, II, 684 . 
— Angelicæ, T, 199. 
- — femorata, II, 286. 
— Flemingi, I, 197. 
— limpida, I, 199. 
— Mexicana, 1 , 199. 
— Pfeifferi, I, 199. 
— SumiclirasLi, I, 199, 201. 
Vitta, II, 456 , 471, 476. 
Villa ore subcroceo, II, 488 . 
Vitta picta, II, 486 . 
— papa, II, 488 . 
— subviridis, II, 4 80. 
— trabalis, II, 477. 
— viridis, II, 4 9 1 . 
V IVÏPARA , II, 28 l. 
■ — commuais, II, 282. 
— inornata, Il , 291. 
— vera, II, 282. 
ViviPARus, II, 281. 
— fluviorum, II, 281. 
Volüta coffea, II, 11, 23 . 
— heteroclita, II, 6, 9. 
Volutaxis, II, 681, 682. 
X 
XANTHONYX Cordovanus, 
Pfeiffer, I, 200 , 202, 208,577. 
— Salleanus, Pfeiffer, 1, 199, 201, 
202 , ao 3 , 577. 
XANTHONYX Sumichrasti, Brot, 
I, 192 , 201 . 
Xeropuila areolata, I, 262. 
Z 
ZONITES elegantulus, Pfeiffer, I, 
177. 
— euryomphalus, Pfeiffer, 1, 143, 
155, 169 . 
— fuliginosus, Griffith, I, i 43 , 
164. 
— fulvoideus, Pfeiffer, I, 177. 
— inornatus, I, i5o. 
— Jalapensis, Strebel, II, 663. 
— kopnodes, I, i 5 o. 
— lucubratus, Say, I, 160. 
— metonomasticus, Crosse et Fi- 
scher, I, 157. 
— minusculus, A. Binney, I, 175; 
If, 681 . 
— nitidopsis, Morelet, I, 173. 
ZONITES nitidus, I, 178 . 
— Paradensis, Pfeiffer, I, 158. 
— pauciliratus, Morelet, I, 173. 
— Selenkai, Pfeiffer, I, 171, 172 . 
— subhyalinus, Pfeiffer, I, 172. 
— Tehuantepecensis, Crosse et 
Fischer, I, 174. 
— trochulinus, Morelet, 1, 172. 
— Tuxtlensis , Crosse et Fischer, I , 
166. 
— Veracruzensis, Pfeiffer, I, i 58 , 
159. 
— vitrinoides, Tristram, I, 170. 
Zua , I, 583 . 
