Eitdodonia.] GASTROPODA. 693 



riblets, flexuous at the periphery, about 12 per millimetre ; the int< T 

 stices with minute fine growth-striae. Colour horny, with radial bands 

 of pale rufous. Spire but little elevated, convex. Protoconch of 1| 

 whorls, smooth and convex. Whorls 5. very slowly increasing, 

 rounded ; periphery and base convex. Suture deep, canaliculate. 

 Aperture vertical, narrow, lunate, within with 18 lamellae 7 spiral 

 plaits on the parietal wall, 1 on the columellar Up, and 10 spiral 

 lamellae on the outer wall. Peristome simple, thin, the outer lip ad- 

 vancing towards the middle, leaving a shallow sinus at the suture. 

 Columclla short, rather straight, its lip slightly reflexed above. Um- 

 bilicus rather narrow, about one-sixth of the greatest diameter, nearly 

 cylindrical, margined with brown. 



Diameter Maj., 2 mm. ; min., 1-75 mm. : height, 1-25 mm. (type). 



Animal having the body elongated, narrow; eye-peduncles long 

 and thick, tentacles moderate ; mantle subcentral, rather anterior, 

 enclosed ; foot very long and narrow, with neither locomotive disc 

 nor caudal gland. Colour pale grey ; eye-peduncles and a stripe on 

 each side of the head purplish ; foot pale brown. 



Dentition (Button, T.N.Z.T., xvi, 166, pi. <). f. P). -Rudula having 

 the formula 12+1 + 12. 



Type in the Canterbury Museum, Christchurch. 



Hob. South Island : Greymouth (Helms). 



6. Endodonta microundulata, Suter, 1890. Plate 27. fig. 8. a c 



Helix microundulata, Sut., T.N.Z.L, xxii, 1889 (1890), 223, pi. 14, f. 4, a~d. 

 Patula (Maoriand) microundulatn. Siit. : Pilsbry, Man. Conch. (2), viii, 

 89, pi. 24, f. 52-56. Endodonlu (l'!i/t-iiod<sn) microundulata, Sut. : 

 Hedley and Suter, P.L.S. N.S.W. (2), vii, ii,">2 : Suter, .1. cle Conch., 

 xli, 



Shell minute, depressed, umbilicate, finely and closely radially ril>- 

 striate, faintly shining, thin and fragile. Sculpture consisting of very 

 fine, dense, slightly protractive riblets, 25 to 35 per millimetre ; the 

 protoconch with still finer and closer costae ; interstices with micro- 

 scopic very fine growth-lines, crossed by indistinct crowded spiral lines. 

 Colour pale-horny with brown undulating or zigzagging radiate bands 

 of variable width. Spire very little elevated, flatly convex. Proto- 

 conch of 1|- convex turns. Whorls 5. slowly increasing, rounded ; peri- 

 phery and -base convex. Suture impressed. Aperture slightly oblique. 

 rotundly lunar, within with 13 lamellae 1 on the middle of the parietal 

 wall, high, thin, distinctly emarginate at the top ; 2 on the columellar 

 lip. stout, with large base, both tongue-shaped and nearly of the same 

 size ; 10 fine long equidistant lamellae on the outer wall. Peristome 

 straight, acute, the outer lip somewhat advancing at the middle. 

 Columella very short, arcuate. Umbilicus deep, cylindrical, rather 

 wide, about one-third of the greatest diameter. 



Diameter. 1-75 mm. ; height, 1 mm. (type). 



