152 Rev. R. SHEPPARD’ ’s Account 
12. TURBO ACHATINUS. 
Cyclostoma achatinum. Draparn. 
In great abundance, in the year 1820, on the beach at Felix- 
stow, within the bay of Harwich, near to Languard-Fort, whither 
they must have been brought from some fresh-water stream ; but 
I have never detected it in a recent state. 
It is very distinct from T. viviparus; is the Cyclostoma acha- 
tinum of Draparnaud ; and is unnoticed by Linnzus. 
Is this the Helix compactilis of Dr. Pulteney? If it be, the 
habitat given by the Doctor is an erroneous one ; for he says it is 
found in woods. 
13. TURBO TENTACULATUS. 
Helix tentaculata. Trans. Linn. Soc. vol. viii. p.220. 
Common in most rivers and streams. I have a specimen 
taken by my valuable friend Mr. Kirby out of a small stream 
near Lyndhurst in the New Forest, in which the lowest volution 
but one is slightly decussated, the horizontal striæ being the 
deepest. 
The form of the mouths of this shell and Turbo viviparus war- 
rants the withdrawing them from the genus Heliz, and placing 
them with Turbo elegans. They, with some others, form an ex- 
cellent subdivision of the Linnæan genus Turbo; and Drapar- 
naud includes them in his genus Cyclostoma. 
16. Turso Lzracuri. 
T. tou imperforata subovata, anfractibus 5 rotundatis oblique 
decurrentibus, sutura conspicua, apertura suborbiculari, 
operculo membranaceo. 
Habitat in rivis. 
Testa 3 lin. longa, 14 lin. lata, cornea, diaphana, glabra. An- 
fractus 5, teretes. Spira elongata. Apex acutus. E 
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