684 GASTROPODA. [Pulmonata. 



4. Trochomorpha (?) Hermia, Hutton, T.N.Z.t., xvi, 183. This 

 is Pachystyla inversicolor, Fer., from Mauritius. 



5. Cydotus Charmian, Hutton, T. N.Z.I. : xvi. 183, which is C. 

 Macgillivrayi, Pfr., from the New Hebrides. 



6. Pyrrka guttula, Pfr. : Hutton, T.N.Z.I., xvi, 200. It is cer- 

 tainly not PfeifEer's species, which is a much smaller shell than that 

 which is still in Hutton's collection in the Canterbury Museum ; it 

 is a foreign hdk-oid shell, but it is still undetermined. 



Fani. ENDODONTID^, Pilsbry. 



Animal having distinct grooves above the margin of the foot, but 

 no caudal mucous pore. Genital system simple, lacking all accessory 

 appendages. 



Shell small, varying from discoidal to truchiform, generally um- 

 bilicated, surface striate or ribbed. 



Distribution. Polynesia. Australasia, South Africa. St. Helena. 

 Ceylon, Celebes, &c. 



Subfam. 1. ENDODONTIN.K 



Jaw thin, membranous, arcuate, vertically striated. Radula 

 having the central and lateral teeth tri cuspid, marginals with 3 To 

 4 cusps. 



Genus 1. ENDOUONTA. Alber.s, 1850. 



, Albers, " Die Heliceen," 185U, 89. Type : Helix lamellosa, Fer. 

 Kndodonta, Martens, " Die Heliceen,'' ed. 2, 90 ; Pilsbry, Man. Conch. (2), 

 ix, 20. 



Animal having a peripodial groove, no caudal mucous pore. Kv< 

 peduncles club-shaped. Reproductive organs simple. Jaw thin, ver- 

 tically more or less distinctly striated. Radula with the basal plates 

 of central and lateral teeth large and square, tricuspid, the laterals 

 sometimes lacking the entocones ; marginal teeth having a low wide 

 basal plate, bearing 3 or 4 cusps, the entocone and mesocone generally 

 united at the base, ectocone simple or bifid. 



Shell small, varying from discoidal to trochiform, generally um- 

 bilicated ; the surface striated or ribbed. Aperture varying from 

 multidentate to toothless ; peristome simple. 



Distribution. Polynesia. Australasia, Celebes, South Africa. St. 

 Helena, New Caledonia, Philippine Islands. r, ir ,,]j n< > s 



SYNOPSIS OF SUKCKNKKA. 



1. Aperture having internal teeth or folds upon the outer wall 



and the parietal wall, sometimes lacking upon the latter THAUMATODON. 



2. Aperture with numerous low folds within the outer lip, 



columellar lip sometimes with 1 or 2 larger entering 

 lamellae, and parietal wall bearing 1 or more smallrr 

 folds, sometimes emarginate . . . . .-. PTYOHODON. 



