546 PATAGONIAN EXPEDITIONS I ZOOLOGY. 



Shell similar to fluminea, but differing by having the parietal lamella 

 very small and deeply placed ; columellar fold smaller than in fluminea. 

 The color is bright greenish-yellow, uniform or marked with 5 or fewer 

 spot-bands ; rarely it is brown or olive-brown. 



Fig. 40. Length 10, diam. 7.4, length of aperture 9 mm. 



" 41. " 8.3, " 6.1 " " 7.5 " 



" 42. " 12.1 " 7.7 " " 10 



" 43. " ii "7.1 " " 8.9 " 



" 44. " ii " 7.7 " " 9.5 " 



Province of Rio Grande do Sul, Brazil : Guatzbu (H. von Ihering, type 

 loc.); Guahyba at Porto Alegre, common on stones (Dr. Hensel). 



Professor von Martens has already referred to the differential features 

 of this race, which inhabits the Jacuhy river system. 



As in C. fluminea, there is wide variation in the size and prominence of 

 the spire, which may be either very short, as in figs. 40, 41, or wider and 

 much more produced, figs. 42, 43. The tip of the spire is worn away in 

 all the examples seen. 



CHILINA GLOBOSA Frauenfeld. 



(Plate XLV, Fig. 45.) 



C. globosa Ffld., Zoologische Miscellen, in Verhandlung derk. k. zoologisch- 

 botanischen Gesellschaft in Wien, 1866, p. 13. 



According to Frauenfeld, this is a round-oval, brownish yellow shell, 

 with three hardly noticeable spot-bands on the last whorl. Columellar lip 

 very thick, covered with a white callus to the upper end, two-toothed. 

 Length 13.8, diam. 10.2 mm. 



The example figured is larger, length 16, diam. 12.5, aperture 13.9 mm. 

 long. It is straw yellow, with traces of a spot-band upon a low spiral 

 angle, which crowns the last whorl. It is also stained with iron oxide in 

 front and under the parietal callus. The very heavy columellar callus 

 continues upon the parietal wall, bearing thick, obtuse, parietal and colu- 

 mellar lamellae. 



This species is chiefly distinguished from C. fluminea by its very heavy 

 parietal callus. 



La Plata States (Ffld.) ; La Plata (coll. A. N. S. P.). 





