718 GASTROPODA. [Pulmonata. 



Protoconcli with fine and close straight radial strise, the post-nuclear 

 whorls with more distant obliquely advancing riblets, acutely arcuated 

 above the periphery, thence slightly flexuous, straight on the base, 

 about 10 per millimetre ; the riblets are equal, equidistant, not very 

 high, rounded, the interstices with fine growth-lines, and the whole 

 shell ornamented with exceedingly fine microscopic spiral striae. Colour 

 pale-yellowish, tessellated with large chestnut spots. Spire flat, very 

 lightly submersed in the middle. Protoconch of 1^ convex turns. 

 Whorls 5i, very narrow, convex, the last whorl somewhat tapering and 

 flattish at the periphery, but widened and becoming somewhat higher 

 on approaching the aperture ; base convex. Suture deep. Aperture 

 a little oblique, smallish, Innately circular. Peristome simple, sharp, 

 retracting and forming a sinus at the suture, margins converging. 

 Columella short, vertical, arcuate. Inner Up strengthened by a 

 moderate callus, not reflexed ; parietal wall with a thin shining glaze. 

 Umbilicus wide, perspective, its diameter 14mm. 



Diameter Maj., 3-7 mm. ; min., 3-3 mm. : height, 1-5 mm. 



Animal and Dentition. Hutton, T. N.Z.I., xvi, 164, pi. 9, f. H. 

 . Animal like that of E. coma. White ; eye-peduncles and a stripe 

 on each side of the head greyish. 



Jaw finely vertically striated. 



Radula having the formula 12 + 3+1 + 3+12. Central and 

 first lateral teeth tricuspid, with a long mesocone, the other laterals 

 smaller, the ectocone obsolete ; marginals tridentate, the denticles 

 nearly equal in size. 



Type in the British Museum. 



Hob. North Island : Waimarama (A. Hamilton) ; Whangarei ; 

 Petane ; Heretaunga ; Hunterville ; Mount Egmont, 3,000 ft. to 

 4,500 ft. ; Shannon (R. Murdoch). South Island : Birch Hill, Nelson 

 (E. Suter) ; Greymouth ; Bealey (v. Haast) ; Oxford (Professor 

 Chilton). 



19. Endodonta irregularis, Suter, 1890. Plate 28, figs. 9, a, b. 



Infecta, Reeve, var. irreyularis, Sut., T.N.Z.I., xxii, 1889 (1890), 224, 

 pi. 14, f. 6, a, b. P. (Charopa) zeta, Pfr., var. irregularis, Sut. : Pilsbry, 

 Man. Conch. (2), viii, 98, pi. 19, f. 13-15. Charopa infccta, Rve., var. 

 irregularis, Sut. : Hedley and Suter, P.L.S. N.S.W. (2), vii, 658. Endo- 

 donta (Charopa} infecta irregularis, Sut,, J. de Conch., xli. 265. 



Shell very small, subdiscoidal, umbilicated, yellowish-white with 

 brown streaks, slightly shining, thin. Sculpture : Protoconcli with 

 fine and close radiate striae, the following whorls more distantly radially 

 ribbed, the ribs somewhat irregularly developed, and inequidistant 

 below the suture ; there are 12 to 13 per millimetre ; they are obliquely 

 directed forward above the periphery, then arcuate and descending 

 almost straight over the periphery to the base ; interstices with fine 

 growth-lines, more or less distinctly reticulated by microscopic spiral 

 l.irse. Colour yellowish -white with distant straight or zigzag streaks. 



