ACHATINA, WEST AFRICA. 



le. Irregular streaks and flames 

 of buff, chestnut and fulvous; 

 obsoletely granulose at su- 

 tures, 78 x 38, apert. 42 mm. 

 in&qualis, no. 31. 

 2e. Corneous-buff, with rather 

 wide stripes, 68 x 39 mm. 

 Ovampoland. 



schinziana, no. 9. 

 Be. Pale straw with Ion git. zebra 

 stripes; 63 x 31 mm. Old 

 Calabar. studleyi, no. 6. 



4e. Brownish-white, lightning- 

 striped with red-brown ; 58 x 

 28, apert. 30 mm. Benguela. 

 semisculpta, no. 7. 



bb. Shell white under a thin yellow cuticle, not 

 noticeably darker basally; spire long; last 

 whorl smooth except near suture ; apert. hardly 

 half the length; columella sinuous, narrowly 

 truncate ; 70 x 34, apert. 34.5 mm. 



occidentalism no. 19. 



bbb. Shell brown or blackish-brown, often darker 

 basally, usually with some darker longitudinal 

 streaks but not zigzag striped. 



c. Solid and heavy, very dark, columella 

 narrowly truncate, tapering 100-125 mm. 

 long. 



dokrniana, no. 12; bandeirana, no. 13. 



2c. Thick, ponderous, flattened at sutures, 



livid-whitish under a thin, tawny cuticle, 



142 x 65 mm. monetaria,, no. 14. 



3c. Moderately solid, rufous-brown with 



darker streaks. 



d. 126 x 61 mm. welwitschi, no. 11. 

 dd. 63 x 33 mm. paivana, no. 10. 



4c. Shell thin, colored like the last. 



d. 74 x 40 mm, bayaona, no. 15. 



dd. 67 x 31 mm. tavaresiana, no. 16. 



