LAND SNAILS. 99 
dried, to remove the moisture and harden the 
soft parts remaining; but the heat must not be 
too great, or else the shells will be discoloured, 
and are liable to be broken. And, further, the 
specimens should be wel! dried before placing 
them in the cabinet, which should be in a well- 
ventilated place, free from damp ; for their fresh- 
ness and beauty are apt to be lost by the growth 
of fungi upon their surfaces. | 
The following synoptical table represents 
the genera into which the family Helicide is 
divided :— 
Shell oval... .. . ... Succinea 
1 hs globular or depressed, mouth transverse... 2 
», more or less cylindrical, mouth longitudinal 4 
2. Shell glassy, outer lip thin... 
» notglassy, outer lip usually reflected ... Helix 
3. phellimperforated “10.5, essen een oes ee 
Prema eaGed 1.8 aa} tage eae sae ” Helicella 
Setieraanormd. sistral 5 fe.) jane aces |. ee geeae EO 
4. a turreted ee Btian, rt aeiey micah! Seek eat ert ea Og 
PPPOE VURAL TIG AN 3.5 sik) ae! nisl af Boe ahahdiseadel coin & 
Mate bionic)... no. BE ces by dae Nee iy eR 
5, Aperture with a Saeco, Sus) pee ihm wae gael COL SLU 
No clausium, aperture toothless ... ... ... Balea 
6. Columella truncated in front... ...  ... Achatina 
Frontrentire 2.) 22. .-0. ee ee». Dulumus acutus 
Shell dextral, animal ai four tentacles . Pupa 
” sinistral or dextral, lower tentacles 
SOE ede a ellis behead nce), RAkgO 
8. rer scsi ase yd aa tee) aise! 'n'uad “pope ag oe 
AVULE, ReM eCard eae Nacio. vave< tes)” ce ENUODEWS 
9. Aperture fouthtewmm mes wwe: 6.0 Wy Gua Lua 
mn denticulated ... 1. 1. we ee — -Arzcoen 
H 2 
