INDEX TO VOLUME I. 



Academy of Natural Sciences, its 



Journal, 35. 

 Acephiila, 92, 96. 

 AcHATiNA, Lk. 128. 



grac-illima, Pf. 109, 128, 162. 

 pellucida, 109, 128, 162. 

 Acknowledgments to co-laborers, 23. 

 Agatina variegata, Raf. 50. 



Aiscata, Kaf. 50. 

 Agriculture, influence on species, 



132, 190. 

 American Zoology, neglect of by 



Europeans, 56. 

 Amnicola, 181. 



Analogues, use of the term, 77. 

 Anatomy of terrestrial gasteropods, 



198. 

 Ancylus, 97. 

 Aorta, 238. 

 Aplodon, Raf. 49. 



Aeion, 97, 163, 165, 168, 171, 172, 

 203, 205, 209, 220, 236. 

 bortensis, 109, 159, 198. 

 Asiphoiiobranchiata, Bl. 95, 96. 

 Atlantic region, features of, 103; spe- 

 cies of, 109. 

 Auricula, 97. 

 AuriculidiB, 96, 97. 

 Azeca, 168. 



Birds, destruction of species by, 134. 

 Blainville, definition of Mollusks, 92. 

 Blood, 239. 

 Boston Society of Natural History, its 



Journal, 35. 

 Buccal body, 206, in Glandina, 214. 

 BuLiMUS, 97, 111, 124, 128, 163, 165, 

 167, 171, 173, 202, 204, 229. 

 acicula, 159. 



Bulimus acutus, Fer. 152, 159. 



dealbatus, 109, 122, 128, 162, 



199 213 229. 

 decoll'atus,' 109, 128, 134, 152, 

 158, 159, 188, 199, 213, 230. 

 exiguus, 109, 128, 129, 140. 

 fallax, 109, 128, 129. 

 fasciatus, 109, 119, 128, 1.52, 

 153, 246. 160, 162, 199, 213, 

 216 229. 

 harpa[ 109, 125. 126, 129. 

 lubricus, 109, 128, 129, 137, 139, 



144, 151, 152, 157, 159. 

 octona, 159. 

 radiatus, 159. 

 subula, 109, 128, 153, 162, 

 serperastrus, 109, 128. 

 undatus. 109, 119, 159. 

 virgineus, 1-59. 

 virgulatus, 109, 119, 128, 152, 



153, 199, 213, 230. 

 zebra, 128, 152, 153, 160, 162. 

 Cabinet specimens, insufHcient for 



study, 72. 

 Calcareous rudiment, 200. 

 Causes, influencing geographical dis- 

 tribution of species, 99 ; mountain 

 ranges, 110; rivers and lakes, 107; 

 ocean, 108; climate, 110; geologi- 

 cal structure, 112; vegetation, 113; 

 humidity and dryness, 113; eleva- 

 tion, 115; inundations of rivers, 

 130 ; fires, 131 ; agriculture, 132 ; 

 destruction by animals, 133; the 

 sea, 135; local, 138. 

 Central region, features of, 103 ; spe- 

 cies of, 109. 



