PILSBRY: non-marine MOLLUSCA of PATAGONIA. 547 



Chilina rushu Pilsbry. 



(Plate XLV, Figs. 31-34) 



Chiliua r//5//// Pils., Proc. A. N. S. Phila., 1896, p. 561, pi. 26, figs. 6, 7. 

 This species is closely related to C.flumiuea, but differs by the acute 

 keel at the shoulder. This keel arises rather abruptly at the end of the 

 second whorl ; and either runs to the end, or after continuing for several 

 whorls, gradually dies out, leaving the last whorl rounded, as in fig. 33. 

 In a young shell 4.3 mm. long, with yyi whorls, the last whorl only is 

 acutely carinate. 



mm. 



111 



Uruguay River at Fray Bentos, Uruguay (Dr. Wm. H. Rush, U.S.N.). 



Chilina parva von Martens. 



Chilina parva v. Marts., Malakozoologische Blatter, XV, 1868, p. 185. 



A small, rather thin, globose form with flat spire ; brown, obsoletely 

 lightning-streaked ; columella having a distinct columellar tooth and a low 

 dentiform swelling below, the parietal callus distinct. 



Length 5>^-6, diam. 4>^-5 mm.; aperture 4>^ mm. long. 



Province of Rio Grande do Sul, Brazil, at Rodersberg, in small brooks 

 in the forest (Dr. Hensel). 



An unfigured species known by the original description only. 



Chilina portillensis Hidalgo. 



Chilina portillensis Hidalgo, Journal de Conchyliologie, 1880, p. 322, pi. 

 II, fig. I. 



An ovate, rather solid olive-green shell, marked with darker spiral bands 

 and lines. It has columellar and parietal folds, and evidently is rather 

 closely related to C.fliiminea. Length 12, diam. 9 mm., length of aper- 

 ture 9 mm. 



Western Argentina at Portillo, 4000 meters elevation. 



' Rush collection. 



