1 
INDE X 
TO THE 
HISTORIA CONCHYLIORUM. 
N. B. When no other arrangement is referred to, the Names of the Species are taken fremi the Editor's 
Descriptive Catalogue of Recent Shells, 
TERRESTRIAL UNIVALVES. 
Tab. Fig. 
8. l. Helix Guadalmpensis. 
— 2. In the Descriptive Catalogue I have followed Chemnitz, in eonfounding tiiis species 
with Helix detrita, but the spire is more produced and pointed, and it has been 
separated by Ferussac with the name of Helix virgulata, which has been changed 
for Bulimus Caribceorum by Lamarck. 
— 3. Gmelin has followed Schroeter, who, in his Einleitung, has quoted this figure, with a 
mark of doubt, for Helix fragilis, but it is niuch more likely to be a small variety 
of Helix palustris, as has been suggested by Draparnaud. Petiver, in his Pteri- 
graphia Americana, t. 12. f. 10. has copied this figure. 
9. 4. Is the Helix flammigera of Ferussac, and the Bulimus Richii of Lamarck. This 
species has been generally confoimded with Bulla Zebra. 
n' 6 J '^ oun S shells of Helix flammigera of Ferussac. 
12. 7. Bulla fasciata. 
13. 8. Bulimus ovoideus of Bruguiere, (Encyclopedie Methodique, p. 335.) and the species 
has not been noticed in the Descriptive Catalogue. Klein, t. 3. f. 65. is a copy. 
14. 9. Is generally considered to be Helix calcaria ; but the spire is less produced, with 
only six whirls, and these are rather more tumid. Bruguiere, at p. 366 of the En¬ 
cyclopedie Methodique, mentions this as the figure of an unknown species. 
15. 10. Bulla virginea. 
16. 11. Is Helix pileus; and Gmelin has followed Schroeter in erroneously describing this 
figure, as a separate species, with the name of Bulla bifasciata. 
17. 12. Helix decollata. 
18. 13. Bruguiere, at p. 327 of the Encyclopedie Methodique, has made .the following re- 
mark in his description of Helix decollata: “ La figure treize de Lister, que je 
“ rapporte a cette espece, represente une coquille qui n’avoit point encore eprouve 
“ de fracture ; on n’en trouve que rarement d’un pareil volume, qui soient dans cet 
“ etat de conservation; car sur plusieurs centaines que j’en ai observe dans leur 
“ pays natal, a-peinc puis-je en citer deux, qui meme etoient d’un tiers plus petites 
“ que celle qui est representee par la figure de cet auteur.” Klein has copied this 
figure in his Meth. Ostracolog. t. 2. f. 44. 
19. 14. The right hand figure is Helix acuta, and the other has been separated from that 
species by Draparnaud with the name of Bulimus ventricosus, which has been 
changed to Helix ventrosa by Ferussac. The Bulimus ventricosus of Bruguiere is 
quite a different shell. 
20. 15. Quoted by Bruguiere for Helix octona, and by Ferussac for his Helix terebraster, 
which he considers to be a distinet species. Klein, t. 2. f. 45. is a copy. 
20. 16. Belongs to the genus Clausilia of Draparnaud, and is the Helix collaris of Ferussac. 
