— 161 — 



spira elongaia, apice acutiuscula ; sutura impressa., cos- 

 tulis pronwientibus crenulata ; anfr. 8-8 1/2 vix con- 

 vexiuscidi, ultimus vetitrosiusculus^ infra médium obsolète 

 angulatus., 1/3 longitudinispaulo superans ; columella sub- 

 torta, oblique truncata, basim non attingens; apert. semi- 

 ovalis; perist. rectum., simplex, tenue. — Longit. 17, 

 diam. 6 mill. 



ffab. In muscosis editis insulœ San Thomé, ad 2,500 ped. 

 altitudinis. 



19. ACHATINA PETRENSÏS. 



T. elongato-turrita, tenuis, pellucida, nitida, cerea, 

 confertim capillaceo-striata, pallide fulva; spira elongata, 

 apice subacuta ; sutura impressa, minute denticulata ; 

 anfr. 9-10 parum convexi, ultimus longitud. 1/3 non 

 œquans, infra médium obtuse angulatus ; columella leviter 

 arcuata, truncata, basim non attingens ; apert. semiova- 

 lis ; perist. simplex, rectum, tenue. — Longit. 16, diam. 

 5 mill. 



Hab. Sierra Leone, prope Freetown, in decliviis mon- 

 rosis,sub lapidibus. 



20. LiMNjEDS SUCCINOIDES. 



T. subrimata, oblonga, solidiuscula, minute striata, ni- 

 tida, lœte cornea; spira conica, apice acuminata ; sutura 

 pallide marginata , strigis incrementi crispula; anfr. 

 5 convexiusculi^ ultimus permagnus, supra médium levi- 

 ter coarctatus, infra suturam impressionibus paucis spi- 

 raliter notatus, longitudinis 2/3 paulo superans; apertura 

 oblonga, medio leviter contracta, margine columellari 

 dilatato, appresso, dextro sursum incurvo, tum arcuatim 

 dilatato.— Longit. 24, diam. \'imill. 



Hab. In rivis stagnantibus fluminis Caroca, prope Cabo 

 Negro {Benguella). 



