64 STREPTAXIS. 



S. HYLEPHILA, Orb. PI. 12, figs. 33, 28. 



Thin, diaphanous, striated, smooth below ; white ; whorls 6 ; 



lip thickened. Diam., 8 mill. 



Bolivia. 



S. ochthephila, Orb. (fig. 28), is a minor variety ; diam., 6 mill. 



S. BOUNOBOENA, Orb. PI. 12, fig. 34. 



Moderately solid, obliquely striate ; whorls 5J ; umbilicus nar- 

 row ; lip callous within ; greenish white, vitreous. 



Diam., 9 mill. 



Bolivia. 

 S. OMALOMORPHA, Orb. PI. 12, fig. 14. 



Thin, striulate, white under a yellowish epidermis ; whorls 7 ; 

 peristome simple. Diam., 19-25 mill. 



Bolivia. 

 S. FLORA,, Pfeiffer. PL 27, fig. 4. 



Depressed orbicular, thin, translucent, lightly striated above, 

 smooth below ; umbilicus moderate, perspective ; lip thin, sharp ; 

 greenish yellow, interior pearly white. Diam., 28 mill. 



Andes of Columbia. 



Pfeiffer places this species in Streptaxis, but its position here 

 appears to me somewhat doubtful. 



S. CUZCANA, Philippi. PL 13, figs. 46, 47. 



Depressed ; striulate above, smooth below, thin, diaphanous, 

 shining ; yellowish brown ; whorls 5-6 ; lip thin, simple, subemar- 

 ginate in the middle. Diam., 16-19 mill. 



Cuzco, Peru; Baeza, Ecuador. 



Helix BaezensiSj Hidalgo, is a synonym. 



S. VITRTNA, Wagner. PL 13, figs. 38-40. 



Subdiscoidal, striulate, pellucid, very shining, yellowish cor- 

 neous ; spire plane, suboxcavated ; whorls 4, the last wide ; peris- 

 tome simple. Diam., 15-5 mill. 



Southern Brazil. 



This species bears the names of Helix circumplexa, Fer., H. 

 valvseformis, Nyst, and Solarium imperforatum, Spix ; the young 

 shell is Helix nana, Wagner, and Solarium pygmaeum, Spix. 



