372 PROCEEDINGS OF THE ACADEMY OF [1899. 



the free, expanded edge of the columella!- lip, and the sharp 

 though small median fold on the columella, are characters sunder- 

 ing Callionepion from other South American Stenogyroid genera. 



The vagina is much shorter than in Rumina (where it equals the 

 length of the spermatheca duct), and the duct of the spermatheca 

 is longer than in Rumina, Achatlna, Neobeliseus or Opeas, being 

 caught with the gut in the loop of the aorta, and consequently the 

 spermatheca lies near the heart, as shown in the diagram annexed 

 to fig. 8a. 



In the wide teeth of the median row, this genus differs remark- 

 ably from all known American J.c/ia^M;i(ice of the " Stenogyra " 

 form, departing from the type of dentition nearly universal in the 

 family. 



Callionepion Iheringi n. sp. PI. XV, flgs. 11, 12, 13. 



Shell rimate, turreted, narrow, subregularly tapering ; surface 

 glossy, covered with a greenish cuticle, somewhat irregularly plicat- 

 ulate, decussated by numerous minute spiral strite or very short cu- 

 ticular processes, which are lost by wear from the greater part of the 

 shell, and then appear as lightly impressed lines. Whorls 9^, mod- 

 erately convex, separated by impressed sutures, the apex very obtuse, 

 with depressed tip, surface of the earlier 2^ whorls cut into an 

 evenly grauose pattern by close, deep, obliquely descending grooves 

 intersecting at right angles; last whorl rounded at base. Aperture 

 irregularly ovate, slightly oblique, its length contained 3i times in 

 that of the shell ; peristome thin, acute, the outer margin slightly 

 expanded, columellar margin reflexed, dilated, impressed at its 

 insertion, bearing a low, narrow submedian oblique fold. Internal 

 pillar slender and nearly straight, with a low spiral fold within the 

 last whorl. 



Alt. 24, diam. 7, length of aperture 6.6 mm. 



Alt. 23.5, diam. 7, length of apertui-e 7 mm. 



Piquete, Prov. Sao Paulo, Brazil (Dr. H. von Iheriug). 



The peculiar apical sculpture separates this from all other South 

 American Stenogyroid species known to me. When this sculpture 

 is obscured by erosion, as occurs to a greater or less extent in many 

 adult shells, the slightly expanded lip and median fold of the 

 columella are still obvious recognition marks. The type is No. 

 71,258, coll. Acad. Nat. Sci. Phila. 



