tndod.onta.} GASTROPODA. 699 



and rounded whorls. Whorls 1, narrow, keeled at about the lower 

 fourth of the volutions, flattish above, the last somewhat reced- 

 ing ; base flatly convex. Suture impressed, margined. Aperture sub- 

 vertical, angularly rounded, flat above. Peristome simple, straight, 

 angled below. Columella vertical, lip slightly expanded. Umbilicus 

 narrow, deep, about one-sixth of the greatest diameter. 



Diameter. 3-3 mm. ; height. 3-3 mm. (type). 



Dentition. Suter, T.N.Z.I., xxiv, 296. pi. 22, f. 36, 37. 



Jaw almost straight, convex on the upper, straight on the lower 

 margin ; very thin, fragile, and transparent ; broadly and faintly 

 vertically striated, the cutting-edge slightly and broadly denticulated. 



Radula having the formula 100 x 15+ 1+15; laterals 6-7. 

 Central tooth rectangular, tricuspid, with a short mesocone and small 

 side cusps. Laterals also tricuspid, the mesodont reaching beyond 

 the base, the entocone larger than the ectocone. Marginals much 

 broader than long, first tridentate. the outer teeth quadridentate. 



Type in the British Museum. 



Hab. South Island : Springburn (Professor Dendy) ; Dunedin 

 (A. Hamilton) ; Saddle Hill, Taieri (E. Suter) ; near Lake Te Anau 

 (Professor Dendy). 



2. Endodonta stipulata, Reeve, 1852. Plate 27, fig. 15, a. 



Helix stipulata, Reeve, Conch. Icon., vii, pi. 132, f. 813. Thera stipulata, 

 Reeve : Button, T.N.Z.I., xvi, 193. Charopa (Mschrodomus) stipulata, 

 Reeve: Hedley and Suter, P.L.S. N.S.W. (2), vii, 659. Endodonta 

 (jEschrodomus) stipulata, Reeve : Suter, J. de Conch., xli, 272, pi. 9, 

 f. 4 ; Pilsbry, Man. Conch. (2), ix, pi. 6, f. 67, 68. Helix alpha, Pfeiffer, 

 M.H. Viv., iii, 1853, 112; P.Z.S., 1852 (1854), 58; Hector, Cat. Land 

 Moll. N.Z., 16; Button, M.N.Z.M., 18. Patula (Charopa) alpha, Pfr., 

 Nomencl. Hel. Viv., 98. Helix alpha, Pfr. : Tryon, Man. Conch. (2), 

 iii, 94, pi. 19, f. 1. 



Shell small, dome-shaped conical, umbilicated, keeled or sharply 

 angled, costate, with membranous plaits ending in short hairs. Sculp- 

 ture consisting of somewhat inequidistant arcuate retractive riblets 

 on the post-nuclear whorls, produced on the lower part into a broadly 

 triangular membrane, ending in a rather short hair ; interstices with 

 very numerous minute growth-striae crossed by microscopic dense 

 spiral lines visible on all whorls, protoconch included. Colour brown, 

 variegated with yellowish- white streaks. Spire rather convexly coni- 

 cal, apex obtuse, about 2| times the height of the aperture. Proto- 

 conch convex, of 1J rounded whorls, the spiral striation sometimes 

 inconspicuous. Whorls 5J, slightly convex, angled above the suture, 

 the body-whorl keeled or sharply angled at the periphery, somewhat 

 receding ; base flattish. Suture deep. Aperture diagonal, somewhat 

 hatchet-shaped. Peristome simple, straight, upper margin short, basal 

 lip arcuated. Columella vertical, slightly dilated above. Umbilicus 

 moderate, open, about a quarter of the greatest diameter, deep. 



