728 
Velletia, II, 34 . 
— excentrica, II, 37. 
Velorita, II, 623, 63 o. 
Venericardia, II, 538 , (>22. 
Vends, II, 622. 
Yerena, II, 3 o 8 , 3 i 5 , 817, 3 18. 
— crenocariiia, II, 3 io, 3 i 5 . 
Veronicella, I, Ü71. 
— iævis, I, 681. 
VERTIGO , Müller, I, 314 , (igg. 
- — ovata, Say, I, 3 i 5 , 316 , 680, 
681. 
— pellucida, I, 3 i 1, 
— pusilla, I, 3 i 4 . 
XANTHONYX, Ci •osse et Fischer, I, 
192, 198, 699 ; II, 673 , 681 . 
— Chiapensis, Pfeiffer, I, 203, 
577 . 
ZEBRA, Shullleworth, I, 427, 436, 
437 , 441. 
— Mülleri, I, 44 1, 445. 
Z 0 NHYALINA, I, 169 . 
— bilineata, I, 167. 
— Jalapeiisis, II, 663 . 
ZONITES, Deuys de Montfort, 1 , 142 , 
151 , 699 ; II, 673 . 
— algirus , 1 , 1 4 2 . 
— 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 . 
Virex, II, 3o8. 
— Scbiedeana, II, 867. 
ViDENA Oajacensis, I, 2i5, 287. 
ViLLORITA, II, 63 o. 
ViTRINA, II, 684. 
— Augelicæ, I, 199. 
— femora la, II, 286. 
— Fleming'i, I, 197. 
— limpida, I, 199. 
— Mexicaua, I, 199. 
— Pfeilferi, I, 199. 
— Sumiclu-asti , I, 199, 201. 
ViTTA, II, 456, 471 , 476 . 
X 
XANTHONYX Cordovanus, 
Pfeiffer, I, 200 , 202 , 208 , 677. 
— Salleanus, Pfeiffer, 1, 199, 201, 
202 , 2o3 , 577 . 
Z 
ZONITES elegantulus, Pfeilfer, I, 
177. 
— euryomphalus, Pfeiffer, I, 143, 
155, 169 . 
— fuliginosus, Griûitb, I, i 43 , 
164 . 
— fulvoideus, Pfeiffer, I, 177. 
— inornatus, I, i 5 o. 
— Jalapensis, Strebel, II, 663. 
— kopiiodes, I, i 5 o. 
— lucubratus, Say, I, 160. 
— metonomasticus. Grosse et Fi- 
scher, I, 157 . 
— minusculus, A. Biuney, I, 175; 
II, 681 . 
— nitidopsis, Morelet, I, 173. 
Viila ore suhcroceo, II, 488 . 
ViTTA jiicta, II, 486 . 
— pupa, II, 488 . 
— subviridis, II, 4 80. 
— trabalis, II, 477. 
— viridis, II, 4 g 1. 
Vivipara, II, 281. 
— communis, II, 282. 
— inornata, II, 291. 
— vera, II, 282. 
Viviparus, II, 281. 
— lluviornm, II, 281. 
VoDDTA coffea, II, 11, 28. 
— heteroclita, II, 6, 9. 
VOLUTAXIS, II, 681, 682. 
XANTHONYX Sumichrasti, BroL, 
I, 192 , 201 . 
Xerophila areolata, I, 262. 
ZONITES nitidus, I, 178. 
— Paradensis, Pfeiffer, I, 158. 
— pauciliratus, Morelet, I, 173. 
— Selenkai, Pfeiffer, I, 171 , 172. 
— subhyalinus, Pfeiffer, I, 172. 
— Tehuantepecensis, Grosse et 
Fischer, I, 174 . 
— trochulinus, Morelet, I, 172. 
— Tuxtlensis, Grosse et Fischer, I, 
166 . 
— Veracruzensis, Pfeiffer,!, i 58 , 
159. 
— vitrinoides, Tristram, I, 170. 
ZuA, I, 583. 
