FLAMMULINA. 17 



Subgenus SUTERIA Pilsbry, 1892. 



Suteria PILS., The Nautilus, Sept. 5, 1892, p. 56, type H. i<l< 

 Gray. Charopa HUTTON, olim, not Albers. Patulopsis SITTER, 

 Trans. N. Z. Inst, xxiv, p. 270, 1891, type H. ida Gray ; not Patu- 

 vpxis Strebel, 1879, a Mexican group of Zonitidce. 



Shell thin and rather opaque, openly umbilicated; discoidal, the 

 spire flat; periphery broadly rounded. Surface having low spirals, 

 and radial, undulating cuticular lamellae bearing hairs; 1? apical 

 whorls smooth. Lip thin, simple. Type H. ide Gray, pi. 3, figs. 

 24-26. 



Animal rather short and narrow ; mantle subcentral, rather ante- 

 rior, slightly reflexed over the peristome of the shell ; foot narrow, 

 extending behind the shell, the tail truncated and furnished with a 

 mucous gland ; no locomotive disc. Eye peduncles very long, 

 cylindrical, approximate at their bases; tentacles long. (Hutton 

 for H. ide.} 



Jaw with 30 flat plaits, each transversely striated. 



Dentition : centrals tricuspid, the mesocone long, ectocones short 

 and constricted on the outer sides. Lateral teeth similar, but the 

 entocone smaller than the ectocone. Inner marginals with one bifid 

 cusp, the outer with several subequal cusps (pi. 2, fig. 8, (F. ide.} 



The principal feature of the umbilicated discoidal shell is its 

 hairy, undulating ribs. The dentition is characterized by the pres- 

 ence of entocones on the lateral teeth ; but Gerontia pantherina, 

 Allodiscus planulata and other forms have this same feature. The 

 single species is from New Zealand. 



F. ide Gray, ii, 210. 

 ida auct. 



Subgenus FLAMMULINA v. Martens, 1873. 



.Flammulina MART., Critical List of N. Z. Moll., p. 12. HEDLEY 

 & SUTER, Proc. Linn. Soc. N. S. Wales, (2) vii, p. 643, 1892.- 

 Amphidoxa of N. Z. authors, not of Alb. Calymna HUTTON, Tr. N. 

 Z. lust. 1884, p. 199, not of Hiibner, 1816. 



Shell narrowly umbilicated or imperforate, globose or depressed, 

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

 which are either smooth and glossy or striated. Aperture large, 

 rounded-lunar ; lip thin, simple, slightly expanded at the columellar 

 insertion. Type F. zebra Le Guill., pi. 3, fig. 23. 

 9 



