Mollusca of Great Britain. 349 
Bulimus octonus. Brug. Encycl. Meth. n. 47. Lam. 
Hist. des Anim. sans Vert. 6. p. 124. 
Helix octona, 8. Gmel. Syst. Nat. 1. p. 3653. 
I am happy in being enabled to add the following very 
respectable authorities for considering this shell as British. I 
was lately presented with a specimen which I observed in the 
cabinet of Mr. Henry Collins of Swansea, who assured me 
that he had found it a few years ago, in company with the 
Clausilia nigricans and Pupa umbilicata, in the walls of the 
old castle at Oystermouth near Swansea. It is a young shell, 
and has the remains of the animal in it. Mr. Dillwyn also 
favoured me with a full-grown specimen, which he believes 
was given him by Miss Hutchins, as collected by that lady 
in the neighbourhood of Bantry, Ireland. This latter spe- 
cimen was sent upon the above authority by Mr. Dillwyn to 
the late Colonel Montagu to be named, who returned it for 
further information. 
— The Helix octona of- Janis," "uid: probably also of 
Dr. Pulteney, is the Helix octanfracta of Montagu and 
other British authors. 
Genus VI. CLAUSILIA. Drap. 
Animal ; corpore angusto, attenuato : tentaculis inferioribus bre- 
vissimis. 
Testa fusiformis, elongata, acuminata: spirá sinistrorsá, intüs 
juxta aperturam ossiculo testaceo resiliente u clauso 
ta, ex- 
. plerumque instructà. . A 
; o undique libero, 
= tis: compressa: D. o continu 
. reflexo. U: mbilicus perangustus. 
This and part of the genus Cyclostoma of Lamarck (the - = 
shells of which latter are upiform}y dextra di haua been, 
-with 
