544 PATAGONIAN EXPEDITIONS : ZOOLOGY. 



Rio Negro, thirteen leagues above its mouth, in the channels formed 

 by the river between the numerous wooded islands of the place called San 

 Xavier, in sandy places (d'Orbigny). 



The var. mendosana Strobel is "smaller, the maximum length i8, 

 diam. lo mm., six-banded." It is from San Carlos, province of Mendoza. 



Chilina puelcha d'Orbigny. 



Chilina piielcha d'Orb., Voy. dans I'Amer. Merid., p. 336, pi. 43, figs. 8-12 ; 

 Strobel, Mat. Malac. Argent, p. 45. 



The shell is oval, thick, yellowish-green, very rarely uniform, but gene- 

 rally marked wath waved longitudinal streaks, widened at their forward 

 angles to form three spiral spot-bands. Columella thick, having a very 

 strong fold. Length 20, diam. 15 mm. 



Rio Negro, 6 or 7 leagues above its mouth, on stones on the shores, 

 very abundant (d'Orbigny). 



Chilina parchappii (d'Orbigny). 



Lhnneits pa re /lappa (XOvh., Magazin de Zoologie, 1835, p. 25. 

 Chilina parchappii d'Orb., Voyage dans I'Amerique Merid., p. 338, pi. 43, 

 figs. 4, 5. 



An elongate, thin species, brownish, with four spot-bands, the spire 

 conic and acute, whorls 5 ; columella typically having a small fold. Length 

 33, diam. 15 mm. 



Pampas between 38° and 39° S. lat., the typical form from the ''Arroyo 

 Sa/ado" on the slopes of the Sierra de la Ventana, near Bahia Blanca. 

 In the ''Arroyo de las Achiras" in the same region a very thin variety 

 of uniform color and without a columellar fold was taken by M. Parchappe. 



Chilina fluminea (Maton). 



(Plate XLV, Figs. 35-39.) 



Voliita fluminea Maton, Trans. Linnean Soc, 1809, X, p. 330, pi. 24, 



figs. 14, 15- 

 Voluta flnviatilis Maton, 1. c, fig. 13. 

 Chilina fluminea Gray, Spicil. Zool., p. 5; d'Orbigny, Voyage dans 



I'Amer. Merid., p. 337, pi. 43, figs. 19, 20; E. A. Smith, Proc. Zool. 



Soc. Lond., 1 88 1, p. 843. 



