STREPTAXID. Vi 
peristome expanded, the right margin flexuous, thickened in the 
middle. 
EDENTULINA, Pfeiffer, 1855. Peristome not toothed. JZ. 
ovoidea, Brug. 
ELMA, H. Adams. A strong sinus at the outer lip; aperture 
edentulous. H. Swinhoet,H. Adams. Formosa. 
GONAXIS, Taylor. Shell pupiform, axis of the apical whorls 
diverted to the right. 
UNIPLICARIA, Pfeiffer, 1855. Parietal margin lamellate; outer 
lip edentulous. #. cerea, Dunker (xcii, 59). Madagascar. 
ENNEASTRUM, Pfeiffer, 1855. Parietal and outer margins of 
aperture both lamellate. 2. elegantula, Morelet. 
GULELLA, Pfeiffer, 1855. Shell ovate, parietal margin lamellate, 
outer lip multidentate. #.capitata, Gould (xcii, 60°. KE. Africa. 
PTYCHOTREMA, Morch, 1852. (Cyclodontina, Beck, 1837.) £. 
Guineensis, Beck. 
HUTTONELLA, Pfeiffer, 1855. Shell cylindrical, parietal margin 
plicate; outer lip quadridentate. H. Kraussi, Pfeiffer. 
DIAPHORA, Albers, 1850. Cylindrical, umbilicated, apex obtuse, 
base obsoletely carinate; whorls ten, flattened, the last detached; 
aperture pyriform, with slightly expanded lip. 2 sp. Indo- 
China, Philippines. £. Cylindrelloidea, Stol. 
STREPTOSTELE, Dohrn, 1866. 
Distr.—4 sp. Prince’s Isl., Africa. S. Nevilli, H. Adams 
(xcii, 61). Seychelles. 
Shell of the form of Achatina, but hyaline as in Streptaxis 
and Ennea; pillar-lip short, twisted and thickened. Color of 
the animal intensely red or yellow, as in the two last-named 
genera, 
GiBBULINA, Beck, 1837. 
Syn.—Gibbus, H. and A. Adams, 1855. 
Distr.—43 sp. Mauritius, Isle of France, Madagascar, Sey- 
chelles. 
Shell corneous or white, solid, caleareous, pupiform or tur- 
binate, summit obtuse; last whorl gibbous, sometimes angulated 
and deformed; umbilicus large, not deep; lip reflected, its 
extremities united by a callus; columella sometimes plicate. 
cippus, Montf., 1810. Shell subconical, whorls irregular, 
laterally compressed. G. Lyonettiana, Pall. (xcii, 62). Isle of 
France. 
GONIODOMUS, Swains., 1840. (Idolum, Pfeiffer, 1855.) . Ovate, 
ventricose, obliquely costulate. G. pagoda, Fer. (xcii, 63). 
Mauritius. 
PLICADOMUS, Swains., 1840. Spire moderate, subconic, obtuse ; 
outer lip reflected ; surface obliquely costulate. G. sulcata, Miill. 
(xcii, 64). Mauritius. 
