COSTIGO. 369 



in the total length, very distinctly contracted near the aper- 

 ture, ascending a little, and very distinctly compressed at the 

 base. Peristome simple, reflected. Aperture subvertical, 

 somewhat rounded, toothed: a parietal fold larger than the 

 others, a columellar fold more deeply placed, and two teeth 

 on the outer wall, situated still further within the aperture. 

 Length about 1%, diam. 1 mm. (Girard). 



Island of San Thome: Binda, under the bark of trees, F. 

 Newton. 



Pupa tiobrei GIRARD, Jonial de Sci., Math. Phys. e Nat. 

 Acmd. Real Sci. de Lisboa, (2), iii, no. 10, 1893, p. Ill, pi. 1, 

 f. 21. 



Compared by Girard with Pupa corpulenta, an American 

 Vertigo. It has sculpture like the Nesopupa, apparently, but 

 does not appear nearly related to known African forms. By 

 the single lamella on the parietal wall it resembles Costigo. 



