NEW FRESH-WATEE GASTROPOD MOLLUSKS OF THE 

 GENUS CHILINA OF SOUTH AMERICA 



By William B. Marshall 

 Assistant Curator, Division of Mollnsks, United States 'National Museum 



The five new species herein described have recently been added 

 to the collection of the United States National Museum, or have 

 been in the collection unnamed or wrongly identified. 



Genus CHILINA Gray 



CHILINA BULLOCKI, new species 



Plate 1, Figures 4, 6 



Shell rather thin, ovate. Whorls moderately rounded, but much 

 longer than wide, i^xial sculpture of very obscure incremental 

 striae, slightly crenulating the suture. Spiral sculpture of faint 

 indications of revolving striae. Color of type dark olive-green with 

 a band of interrupted reddish spots a short distance below the 

 suture and three nearly continuous bands of the same color lower 

 down on the whorl. Externally these bands are faint, but in the 

 aperture they show plainly although thinly coated with the white 

 and pinkish of the interior. Aperture about two-thirds the length 

 of the shell, outer lip simple, columellar lip white, its lower part 

 nearly straight, broad, reflected over a false umbilicus on the left 

 margin, and with an oblique strong, entering fold at its upper end. 

 Parietal wall with a thin white callus and a revolving plait on its 

 lower portion. Interior whitish, flushed with pink, the reddish 

 bands of the exterior showing plainly. 



Type.—TlciQ type (U.S.N.M. No. 414163) measures: Length, 27 

 mm; diameter, 15 mm; length of aperture, 19 mm; axial length of 

 body whorl, 23 mm. It and 24 paratypes (U.S.N.M. Nos. 414164, 

 414165) were collected and presented by D. S. Bullock, of the Es- 

 cuela Agricola de " El Vergel," at Angol, Chile, and came from the 

 " mill canal that comes from Rio Malleco, El Vergel, Angol, Chile, 

 November, 1928." Four other paratypes were returned to Mr. 

 Bullock. 



No. 2949.— Proceedings U. S. National Museum, Vol. 82, Art. 8 



150259—33 ^ 



