20 TROCEEBINGS or THE SCIENTIFIC ASSOCIATION. 
Tornatellina lamclhla Potiez & Michaud. 
Achatina lamellata, Pot. £ Mich, Gal. Moll. I., p. 128, 
t. 11, f. 7, 8. 
Achatina lamollata, Pfeiffer , Jlelic. II., p. 272, no. 85. 
,, „ Droaet, Moll. Guy. Franq. p. 70, pi. 2, 
f. 21, 22. 
Loptinaria antillarum, Shuttleworth . 
Bulimus unilamellatus, IP Orbigmj, Voy. Amir. Merid. 
Moll. p. 257. 
An elongate-ovato diaphanous colorless shell -with a 
truncato columella, a simple peristome, and a lamellar pa- 
riotal tooth or plait. 
This mollusc is viviparous. It lives amongst decaying 
wood. 
Iloight 13 mill., diameter 6 mill. 
Stenogyra Shuttleworth 1850. 
Terrestrial Inoperculata with thin turretod hyalino 
eh oils of many slowly increasing whorls having a simple 
aperturo and an acute poristome. 
I havo on the present occasion included in this gonus 
two species, which in my previous memoir I excludod from 
it, talcing tho truncate columella of Stenogyra as the ground 
of that exclusion. But although this character is used as 
a distinction between tho genera Bulimus and AchatHa, it 
is a question whether wo may not bo allowed, at least pro- 
visionally, to considor this with Albers a distinction of loss 
importance in some groups. And I am decided to take 
this course by the apparent characters of the lingual denti- 
tion, though it is with some considerable hesitation that I 
do so, and I trust to futuro investigation to elucidate tho 
true position of these molluscs. 
