102 LIMN AIDA. 
AMPHIP£PLEA, Nilsson, 1822. 
Syn.—Myxas, Leach, teste Turton, 1831. 
Distr.—18 sp. Europe, East Indies, Australia, Philippines. 
A, glutinosa, Mull. (ciii, 10). 
Shell globular, ventricose, thin, transparent ; spire very short, 
depressed ; aperture very large; columella without fold; outer 
lip sharp. 
Animal with the mantle-margins developed, partly covering 
the shell; tentacles flat, triangular. 
Erinna, H. and A. Ad., 1858. 
Distr._Sandwich Islands, Isle of Bourbon. £. Newcombi, 
H.-and Ac Ads (ei, 12): 
Shell semiglobose, thin, horny, olivaceous, longitudinally finely 
striated ; spire very short, obtuse, apex rather eroded, last whorl 
ventricose; aperture large, semiovate; inner lip posteriorly 
ascending on the body-whorl; columella straight, excavated, 
and with a curved, elevated, external ridge continued in front 
into the outer lip, which is simple and acute. 
The shell much resembles Lithotis, Blanford, but the descrip- 
tions of the animals differ. 
LANTZIA, Jousseaume, 1872. 
Distr.—L. carinata, Jouss. Isle of Bourbon. Living in moss, 
at 1200 metres altitude. 
Shell auriform, with very short spire, last whorl tricarinate ; 
peristome thickened within ; columellar lip flattened, forming a 
septum. Foot large; tentacles flattened, triangular, with eyes 
on prominences at their base, interiorly ; jaw fibrous, of three 
segments. / 
? CaNnEFRIA, Issel, 1874. 
Distr.— C. splendens, Issel. Borneo. 
Shell small, cylindrically conical, summit truncated by erosion, 
suture lacerated, irregular, aperture entire, without plications or 
teeth, lip simple. 
Appears to partake somewhat of the characters of Auricula. 
Puysa, Draparnaud, 1801. 
Etym.— Physa, a pouch. 
Syn.—Rivicola, Fitz., 1833. Isidora, Hald. 
Distr.—100 sp. North America, Europe, East Indies. Fossil, 
43 sp. Wealden—, Europe; Cretaceous—, N. Am. P. ancillaria, 
Say (ciii, 12). P. fontinalis, Linn. (ciii, 13). 
Shell ovate, sinistrally spiral, thin, polished ; aperture rounded 
in front. 
Animal with long, slender tentacles; the eyes at their bases ; 
mantle-margin expanded and fringed with long filaments. Jaw 
