164 



MANUAL OF THE MOLLUSC A. 



SUCCINEA, Draparnaud. Amber- snail. 

 Type, S. putris, PI. XII. fig. 23. 



Syn. Cochlohydra, Per. Helisiga (S. Helenae) Less. Amphibulima (patula) 

 Beck ; Pelta (Cumingii) Beck. 



Shell imperforate, thin, ovate or oblong; spire small; aperture large, 

 obliquely oval ; columella and peristome simple, acute. 



Animal large, tentacles short and thick, foot broad ; lingual teeth like 

 helix ; S. putris has 50 rows, of 65 teeth each (Thomson}. Inhabits damp 

 places, but rarely enters the water. 



Listr. 68 sp. Europe 5, Africa 3, India ], Australia 1 ; Pacific Ids. 17, 

 N. America 14, S. America 11, W. Indies 11. Fossil. Eocene, Brit. 



Sub-genus. Omalomjx, D'Orb. 0. unguis. PI. XII. fig. 24. Shell oval, 

 convex, translucent, spire nearly obsolete, margins sharp. Animal large, 

 slug-like ; shell placed on the middle of the back, with the mantle slightly 

 reflected upon it all round. Dist. 2 sp. Bolivia ; Juan Fernandez. 



BULIMUS, Scopoli. 



Etym. ? Boulimos, extreme hunger (in allusion to its voracity !) 

 Syn. Bulinus, Brod. (not Adans). Type. B. oblongus. PL XII. fig. 10. 

 Shell oblong or turreted ; aperture with the longitudinal margins unequal, 

 toothless or dentate ; columella entire, revolute externally or nearly simple ; 

 peristome simple or expanded. 



Animal like Helix. B. ovatus attains a length of 6 inches, and is sold 

 in the market of Rio ; it oviposits amongst dead leaves, the eggs have a 

 brittle shell, and the young when hatched are an inch long. (See p. 54, 

 fig. 31.) 



Sections. Odontoslomus (gargantuus) Beck, 

 aperture toothed, 13 sp. Brazil. 



Pachyotis, Beck (Caprella, Guild.) fig. 91.* 



Partula, Fe'r. P. faba. PI. XII. fig. 13, 



Tahiti. 26 sp. Asiatic, Australian and Pacific 



Ids. 24 ; S. America 2. The animal is ovo- 



viviparous. 



Gibbus (Lt/onnetianus)^I.outL Shell hump- 

 backed ; Mauritius, 2 sp. 



Bulimulus, Leacli. B. decollatus. PI. XII. 

 figs. 11, 12. Shell small, lip acute. Above 

 300 sp. England 3 sp. 



Zua, Leach. Z. lubrica. PI. XII. fig. 14. 

 Shell polished, columella slightly truncated. 



Azeca, Leach. A. tridens. PL XII. fig. 15. 

 Shell polished, peristome thickened and toothed. 



Fig. 91* B. auris-vulpina. 



'* Fig. 91. Bullmus auris-vulpina, Chemn. The great extinct land-snail of St. 



