a) 
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CARYCHIUM. 
Carycutum, Miller. 
Hexix, Gmelin. 
Turso, Montagu, Maton et Rackett. 
CHARACTER GENERICUS. 
Testa univalvis, ovalis aut oblonga, spiralis: spzra ele- 
vata, regularis, obtusa, anfractibus duobus ultimis 
maximis: os integrum, elongatum: labium internum 
plicatum, infra medium cavernoso-inflexum; evter- 
num incrassatum, marginatum. 
Anim At ftentaculis duobus cylindricis, brevibus, ob- 
tusis, oculis ad basin postice : operculo nullo. 
CARYCHIUM. 
GENERIC CHARACTER. 
Shell univalve, oval or oblong, spiral; spire elevated, re- 
gular, obtuse, with the two last whirls very large; mouth 
entire, elongate: internal lip plicate, with a hollow below 
the middle: external lip thickened, margined. 
ANIMAL with two cylindric, short, obtuse ¢entacula, 
with eyes at their internal base; operculum none. 
The genus Carychium was instituted from the stracture 
of the animal by Miiller, but it has either been confounded 
with Auricula, (from which it is at once distinguished by 
-having the two last volutions remarkably larger than the 
others, and by the want of the upper part of the inner lip), 
or has been entirely neglected by the follawers of De La- 
marck 
} Q 2 
