\ 



Endodonta.] GASTROPODA. 723 



25. Endodonta subinfecta, Suter, 1899. Plate 28, figs. 12, a. />. 



Endodonta (Charopa) subinfecta, Suter, P. Mai. S., iii, 1899, 286, pi. 15, f. 2. 



Shell very small, subdiscoidal, broadly umbilicated, thin, semi- 

 transparent, ribbed, not shining, horny with rufous patches. Sculp- 

 ture : Protoconch with fine radiate strise ; the following whorls with 

 equidistant, oblique, sharp, and rather elevated riblets, protractive 

 near the suture, acutely arcuate toward the periphery, whence they 

 descend flexuously to the base, about 8 per millimetre ; the inter- 

 stices microscopically decussate. Colour yellowish-white, with rufous 

 patches above, but forming indistinct zigzag bands toward the base. 

 Spire almost flat. Protoconch white, of 1J convex turns. Whorls 5, 

 the first three very narrow, the others more rapidly increasing, convex, 

 the last very lightly descending in front ; periphery and base rounded. 

 Suture deep. Aperture oblique, rotundly lunate. Peristome thin, 

 sharp, extremities converging, the upper lip slightly advancing and 

 leaving a distinct infrasutural sinus. Columella arcuate, vertical, short. 

 Inner lip slightly callous and expanded ; parietal wall with a broad 

 thin shining glaze. Umbilicus broad and perspective, about one- 

 third of the greatest diameter. 



Diameter, 3 mm. ; height, 1-5 mm. Diameter of umbilicus, 1-1 mm. 



Animal unknown. 



Type in my collection. 



Hob. - - South Island : Kenepuru (McMahon) ; Stonyhurst (F. 

 Suter) ; Riccarton Bush, type (H. S.) ; Little River (H. S.). 



26. Endodonta tapirina, Hutton, 1883. Plate 28, figs. 13, a, b. 



Patula tapirina, Hutt., T.N.Z.I., xv, 1882 (1883), 134; xvi, 193: Tryon, 

 Man. Conch. (2), iii, 23 ; viii, 97 ; ix, pi. 6, f. 63-65. Charopa 

 tapirina, Hutt. : Hedley and Suter, P.L.S. N.S.W. (2), vii, 656. Endo- 

 donta (Charopa) tapirina, Hutt. : Suter, J. de Conch., xli, 268. Patula 

 coma, Gray : Hutton, T.N.Z.I., xiv, 150 ; not of Gray. 



Shell small, subdiscoidal, broadly umbilicated, closely ribbed, the 

 riblets of unequal elevation, thin but fairly solid, the riblets shining. 

 Sculpture : Protoconch either smooth (Otago specimens), or finely 

 radiately striate, which occurs in most specimens that came under 

 my observation ; the following whorls with narrow oblique riblets, 

 about 8 per millimetre ; they are protractive above, arcuate toward 

 the periphery, thence straight, but somewhat flexuous ; 2 to 4 lower 

 riblets are usually followed by a higher one ; interstices with a few 

 growth-lines, but no spiral sculpture. Colour horny-brown, sub- 

 radiated with reddish-brown, or yellowish-brown with faint radial 

 darker streaks. Spire very slightly elevated, mostly quite flat. Proto- 

 conch of 1| convex volutions. Whorls 5, slowly increasing,, rounded, 

 periphery and base convex. Suture well impressed. Aperture sub- 

 vertical, rotundly lunate. Peristome thin and sharp, upper margin 

 rapidly advancing, leaving a distinct sinus at the suture, then turning 



