GASTROPODA. 671 



\vavy growth-s'trise, crossed by indistinct microscopic spiral lines ; 

 low and rather distant spirals are clearly visible on the base, but 

 mostly indistinct on the upper surface ; the hairs are produced at the 

 crossing-points of these with the radial riblets. Colour pale brown, 

 radiated with narrow undulating bands of blackish-brown. Epi- 

 dermis thin, horny, easily peeling ofL Spire perfectly flat. Proto- 

 conch of H convex and shining whorls, with microscopic indistinct 

 radial lines. Whorls 5|, the first three very slowly increasing, convex, 

 periphery broadly convex ; base flatly rounded. Suture deep. Aper- 

 ture slightly oblique, triangularly lunate. Peristome simple, straight. 

 Outer lip advancing above, retractive toward the suture with a dis- 

 tinct sinus ; basal lip flattish. Columella short, oblique, arcuate. 

 Inner lip slightly callous, very little reflexed, spreading broadly as 

 a very thin shining glaze over the convex parietal wall. Umbilicus 

 quite open, deep, slightly perspective, about one-fifth of the major 

 diameter. 



Diameter Maj., 8mm. ; min., 7 mm. : height, 4 mm. 



Animal and Dentition (Hutton, T. N.Z.I., xvi, 164). Radula with 

 the formula 22 + 1 + 22 ; laterals about 8. 



Type in the British Museum. 



Hob. North Island : Whangaroa (C. Cooper) ; Great and Little 

 Barrier Islands ; Waiheke Island (H. 8.) ; Thames ; Hillyer's Creek ; 

 Ohaupo ; Maketu ; Mamaku ; Mount Pirongia ; Heretaunga ; Toko ; 

 Midhirst ; Ngaputahi. Tuhoe-land (A. Hamilton) ; Forty-mile Bush ; 

 Wellington (H. S.). South Island : Kenepuru ; WairoalGorge ; Birch 

 Hill, Nelson ; Collingwood ; Greymouth ; Caplestonj ' near Lake 

 Mahinapua (Professor Dendy). 



Genus 10. FLAMMULINA, Martens, 1873. 



Flammulina, Mts., Grit. List, 12 ; Pilsbry, Man. Conch. (2), ix, 1894, 17. 

 Type : Helix phlogophora, Pfeiffer. Amphidoxa of New Zealand authors ; 

 not of Albers, 1850. Catymna, Hutton, 1884 ; not of Hiibner, 1816. 



Animal carrying the shell subcentrally, mantle-edge slightly re- 

 flected over the peristome of the shell, with an even margin ; tail 

 depressed, rounded, with a mucous gland. 



Jaw delicate, arcuate, with numerous vertical plaits. 



Radula with the mesocone of the central tooth well developed, 

 ectocones small or wanting ; lateral teeth similar to the central ; 

 marginal teeth usually tricuspid, sometimes with 4 cusps, in some 

 species the cusps coalescing on the outer teeth. 



Shell narrowly umbilicated or imperforate, globose or depressed, 

 thin, fragile, subpellucid, composed of a few rapidly widening whorls, 

 which are either smooth and glossy or ribbed ; aperture large, rounded 

 lunar ; lip thin, simple, slightly expanded at the columellar insertion. 



Distribution. New Zealand, Tasmania, Lord Howe Island. Norfolk 

 Island ; Ponape, Carolines. 



