GASTEROPODA. CARYCHIADZ, 95 
Synopsis Generum. 
Testa ventricoso-turrita; ad apicem obtusa. 
Peritrema marginatum, subreflexum ; 
posticé tenuiter inchoatum. Unmbilicus 
eeEWSS., 22... op +n» +, 4). CARYCHIUM: 
Testa acuminato-turrita ; ad apicem ma- 
millata. Peritrema interne marginatum, 
posticé fortiter inchoatum. Umbilicus 
BeOeeOGHI MR ws es Ae BAMENTAR 
Testa acuminato-turrita; ad apicem ma- 
millata. Peritrema interne marginatum, 
posticé nullum. Umbilicus apertus.. 43. ALExta. 
The animals composing this family have two tentacula fur- 
nished at their base with eyes. The aperture of the shell is 
always folded or toothed. The umbilicus is perforate in the 
indigenous genera; all of which have their two last whorls 
remarkably larger than the others. 
Genus 41. CarYCHIUM. 
Carychium, Miiller, Leach. 
Tentacula duo cylindracea, brevia, obtusa, posticé ad basin 
oculigera. Testa ventricoso-turrita, ad apicem obtusa. Aper- 
tura ad dextram et ad sinistram subrotundata. Peritrema 
marginatum, subreflexum ; posticé tenuiter inchoatum. Um- 
bilicus subclausus. 
Tentacula two, cylindric, short, obtuse, bearing eyes at their 
base behind. Shell ventricosely-turrited, its apex obtuse. 
Left and right side of the aperture somewhat rounded. Peri- 
treme margined, and somewhat reflexed ; slightly commenced 
behind. Umbilicus somewhat closed. 
CARYCHIUM MINIMUM. 
€. testa pellucido-albida, nitida ; anfractibus transversim strio- 
latis; apertura 3-dentata. 
Carychium minimum, Mill. Verm. Hist. 1. 125; Leach, Zool. 
Mise. 1. 84. 
Helix Carychium, Gmel. Syst. Nat. i. 3665. 
