ART. 12 NEW LAND AND FRESH-WATER MOLLUSKS MARSHALL. 6 



at the middle of the outer lip and the lower one giving rise to the 

 larger of the two basal teeth. 



The type (Cat. No. 362153, U.S.N.M.) measures : Length, 20 mm. ; 

 diameter, 7 mm.; length of aperture, 8 mm. It and a paratype 

 (Cat. No. 194201, U.S.N.M.) come from Goyaz, Brazil, and were 

 presented by Dr. H. von Ihering, who says they were collected by 

 Baer in 1906. 



The nearest relative of this species is Odontostomus {Cyclodon- 

 tina) scahrellus Anthony, which is longer, more slender, has lieavier 

 axial riblets, a distinct channel at the upper end of the outer lip and 

 one at the end of the columellar lip, and has only 7 teeth, each of 

 which is smaller than the corresponding tooth of iher^iiigi. 



SUCCINEA FELIPPONEI, new species 



Plate 1, fig. 4 



Shell rather thick, inflated, ovately globose, with very large aper- 

 ture. Whorls 314, descending slowly, the body whorl about four- 

 fifths the length of the shell. Suture well impressed. Sculpture con- 

 sisting of a number of riblike, slightly retractive lines of growth 

 marking former locations of the outer lij), and lesser growth lines 

 on and between these riblets General color pale creamy, with a dark 

 line just back of and emphasizing each principal growth line, the 

 interior with the same colors as the exterior. Aperture oval, two- 

 thirds the length and three-fifths the diameter of the shell, a promi- 

 nent callus on the parietal wall running down to the midpoint of 

 the columella. 



The type, U.S.N.M., Catalogue No. 362976, measures : Length 14.5 

 mm. ; greater diameter, 9.5 mm. ; lesser diameter, 6 mm. ; length of 

 aperture 10 mm. ; width of aperture 6 mm. It and a paratype. Cat. 

 No. 362977, U.S.N.M., come from the Carrasco, Department of Mon- 

 tevideo, Uruguay, and were presented by Dr. Florentino Felippone. 



The inflated form, the riblike growth lines, and the dark longitudi- 

 nal markings on the creamy background make this a well-marked 

 species. 



AMPULLARIA SUPERBA, new species 



Plate 1, fig. 9 



Shell imperforate, turbinate, rather thick; whorls six in number, 

 well rounded, body whorl very large; sutures well impressed, nar- 

 rowly margined. Surface apparently smooth and glossy, but a lens 

 reveals a minute axial sculpture of numerous growth striae and a 

 number of revolving lines made up of very fine granules. The peri- 

 ostracum of the two earliest whorls is eroded ; on the next two whorls 

 it is fairly well preserved and shows that it bore numerous revolv- 



