88 SUCCINEID &. 
Animal limaciform, blunt before, short behind; tentacles 
simple; mantle large, central, its margins holding the edges of 
the external shell; no longitudinal furrows above the margin of 
the foot, and no caudal mucous pore; no distinct locomotive 
disk; external respiratory and anal orifices on the right central 
margin of the mantle; generative orifice below and behind the 
right eye-peduncle, 
Shell external, its margins embedded in the mantle, rudi- 
mentary, paucispiral, oval, depressed, unguiform. 
Jaw smooth, with median and accessory quadrate plate. Lin- 
gual membrane with tricuspid centrals, tricuspid laterals, and 
multifid quadrate marginals. 
Hyauimax, H. and A. Ad., 1855. 
Distr.—Mauritius, Nicobar Islands. H. pellucidus, Quoy 
(ci, 49, 50). 
Animal limaciform, swollen at centre, blunt before, and 
tapering behind; tentacles simple; mantle large, central, con- 
cealing all but a small opening; an internal shell-plate ; no longi- 
tudinal furrows above the margin of the foot, and no caudal 
mucous pore ; no distinct locomotive disk; external respiratory 
and anal orifices on the central right margin of the mantle; 
orifice of combined genital system on right side of head, half- 
way between eye-peduncle and mantle. 
Shell large, rudimentary, thin, oval, unguiform, non-spiral. 
Jaw smooth with blunt median projection and accessory 
quadrate plate. 
Lingual membrane with tricuspid central teeth, multifid 
laterals, and quadrate marginals. 
Lirnoris, Blanford, 1863. 
Distr.—3 sp. India, Tahiti. JZ. rupicola, Bl. (c, 40). 
Shell external, auricular, ovate, thin, with an external longitu- 
dinal carina and corresponding internal sulcus ; aperture rather 
large, continuous; spire small. The animal has large eyes, on 
short, retractile peduncles tumid towards the base; inferior 
tentacles not visible; foot short, pyriform. 
Jaw oxygnathous; radula like Helix. 
The position of this genus is uncertain; it appears to agree 
with the Succineide in the want of inferior tentacles, but differs 
in the character of the jaw. 
CATINELLA, Pease, 1871. 
Distr.—3 sp.. Polynesia. C. rubida, Pease. C. explanata, 
Gld. (c, 34). 
Shell planulate, fragile, spire rudimentary. Arboreal. 
