Endodonta. \ GASTROPODA. 705 



very fine and close radiate riblets, about 20 per millimetre, straight 

 from the suture, slightly retractive at the periphery, and straight on 

 the base ; interstices with a few growth-lines and not very distinct 

 microscopic dense spiral lines. Colour golden-brown. Spire flat. 

 Protoconch of 1-| convex and smooth turns. Whorls 3j, rather rapidly 

 increasing, convex ; periphery and base rounded. Suture well im- 

 pressed. Aperture rotundly lunate, slightly oblique. Peristome thin, 

 straight, regularly arched, margins converging. Columella very short, 

 arcuate. Inner lip not thickened and not reflexed ; parietal wall with 

 a thin white glaze. Umbilicus moderate, deep, conical, about a 

 quarter of the greatest diameter. 



Diameter, 2 mm. ; height, 0-8 mm. 



Animal with the foot bright orange. 



Dentition unknown. 



Type in Mr. Webster's collection. 



Hob. North Island : Waiuku, scarce, type (Webster) ; Waitakerei 

 Range (H. S.). 



5. Endodonta coma, Gray, 1843. Plate 27, figs. 20, a, b. 



Zonitc.fi coma, Gray, Dieff. N.Z., 263 ; M.H. Viv., i, 113. Helix coma, Gray, 

 M.H. Viv., iii, 99 : Conch. Cab. (2), i, 461, pi. 154, f. 37-39 : Reeve, 

 Conch. Icon., vii, pi. 130, f. 796 ; pi. 131, f. 800 : Ereb. & Ter., 1, pi. 1, 

 f. 3 : Man. Conch. (2), iii, 22. H. (Charopa) coma, Gray : Hector, Cat. 

 Land Moll. N.Z., 11. Patula coma, Gray : Hutton, M.N.Z.M., 8 ; 

 T.N.Z.I., xvi, 191. Endodonta (Charopa) coma, Gray : Pilsbry, Man. 

 Conch. (2), ix, pi. 6, f. 57-59 ; pi. 9, f. 23, 24 : Hedley and Suter, P.L.S. 

 N.S.W., vii, 653 : Suter, J. de Conch., xli, 261. 



Shell small, depressed, widely umbilicated, rather thin, obliquely 

 rather distantly ribbed, streaked with brown and whitish. Sculpture 

 of the post-nuclear whorls consisting of oblique flexuous radial riblets, 

 distinctly retractive at the periphery, about 2 per millimetre, but 

 their number is very variable ; the interstices with microscopic fine 

 growth-lines and spiral lirse. Colour horny, with radial brown flames, 

 which are of a lighter tint on the base. Epidermis thin, horny, faintly 

 shining. Spire a little elevated, flatly convex. Protoconch of 1J 

 convex and smooth turns. Whorls 5 to 5J, rather convex, slowly 

 increasing, the last obscurely angled at the periphery ; base convex. 

 Suture impressed. Aperture diagonal, lunately rotund. Peristome 

 simple, straight, margins slightly convergent, upper part very slightly 

 bent backwards. Columella short, vertical, arcuate. Inner lip a little 

 expanded, not thickened, forming a thin shining glaze on the parietal 

 wall. Umbilicus broad, conical, showing all the whorls. 



Diameter -Ma]., 7 mm. ; min., 6 mm. : height, 3 mm. (type). 



Animal small, mantle rather posterior, the tail not produced behind 

 the shell ; eye-peduncles large, clavate, approximated at their bases ; 

 the tentacles short. Yellowish-white, eye-peduncles and a stripe 

 down each side of the head dark purple. (Hutton.) 



23 Moll. N.Z. 



