UNDETERMINED PUP^. 67 



last carinate at the base and contracted at the aperture. 

 Aperture semi-oval, one-toothed, the tooth standing on the 

 callous; peristome whitish, reflected, continuous in a callous. 

 Length 11, diam. 4% mm. (Tristram). 



Palestine: Ainat, Lebanon (Tristram). 



Pupa libanotica TRISTRAM, Proc. Zool. Soc. Lond., 1865, p. 

 538. 



This species has not been figured. It may belong to the 

 Enida, but has been considered a Torquilla. 



Pupa plusiodonta Holmberg. Shell subperforate, fusiform- 

 ovate, thick, scarcely shining, unequally subplicate and stri- 

 ate, brownish fulvous, paler towards the apex ; spire subovate- 

 conic, the apex obtuse, suture deep; whorls 7%, gradually 

 increasing, convex, the first brownish-tawny, smooth, the rest 

 darker, the last very little ascending, one-third the length. 

 Aperture oval, contracted by 8 pliciform teeth : two parietal, 

 of which one is produced to the suture, the other more deeply 

 placed, parallel, further from the right margin; two on the 

 columella, of which one further from the base is higher than 

 the other ; one basal, is smaller than the rest ; and three mar- 

 ginal, parallel and equidistant, the first nearly basal, the 

 second going further in, the third deep ; these being visible ex- 

 ternally as whitish lines. Peristome acute, expanded, pale, 

 whitish externally and within; columellar margin straight, 

 the basal regularly curved, right margin moderately curved, 

 becoming strongly so near the suture; margins separated, 

 joined by a thin callous. Length 9%, diam. 3%, aperture 3^2 

 mm. long, 2% wide (Holmberg}. 



Argentina: on the left bank of the Rio Negro near where 

 it enters the sea, a single specimen found among fluviatile, 

 land and sea shells (Pupa plusiodonta HOLMBERG, Apuntes de 

 Historia Natural, i, no. 2, Feb. 1909, p. 27). 



It has not been figured. The description suggests a form 

 of Abida or Chondrina. As the unique type was found among 

 shells which had been collected some twenty-five years before, 

 it appears likely that a stray European shell, perhaps from 

 Italy, had got among them in the meantime. 



The following names, without further information, except 



