Addenda et Corrigenda 
p, 7. De animale Geomelaniae conf. Arth. Adams in Proc. Zool. Soc. 
1849. p. 169. 
p. 7. Geomelarna Jamaicensis Petit in Journ. Conch. 1851. I. t. 2. f. 4. 
p. 31. Cyclost. volvuloides Sow. t. 31B. f. 312. 313. (non 314.) 
p. 31. Cyclostoma aratum Bens. (Ann. and Mag. VIII. p. 190) tamquam 
synonymum subjungatur Cycloio subdiscoideo Sow. (N. 53.) 
p. 40. Cyclotus Taylorianus Pfr. Synon.: C. Charbonnieri Reel, in 
Jonrn. Conch. 1851. II. p. 214. t. 5. f. 12. 13. 
p. 43. Plcrocyclos planorbulus Lam. — Desk. Traite elem. t. 82. f. 3. 4. 
p. 47. Pterocyclos nanus Bens. (Ann. and Mag. 1851. VIII. p. 450), 
Chemn. ed. II. Cyclost. t. 49. f. 31 — 33. 
p. 52. Cyclostoma Lyonnetianum (Hygrobium) Lowe in Ann. and Mag. 
IX. Apr. 1852, et Synops. diagn. p. 15. N. 70. 
p. 52. 1. 14, adde : 
B. Cr. eostatnm SSiBittlewortli. f 89a. 
T. rimato-subperforata, globoso-conica, tenuis, pulcherrime 
costata, costis lamelliformibus, in anfr. ultimo versus aperturam 
evanidis , fusco-cornea ; spira acuta ; anfr. 5 convexi , ultimus 
basi inflatus; sutura profunda; apertura circularis ; perist. 
duplex: externum tenue, membranaceum, internum paululum 
recedens, albo-incrassatum. — Operc. membranaceum, palli- 
dum, arctispirum, subtus lamina prominente in aperturam 
intrante auctum, aperturam superficialiter claudens. — Diam. 4, 
alt. 4 mill. (Sh.) 
Cyclostoma (Craspedopoma) costatum Shuttl. Diagn. n. Moll. N. l.p. 11. 
Habitat in insula Palma (Blauner). 
* 
p. 53. Aulopoma Itieri /?, adde: Cyclostoma Hoffmeisteri Bens, in Ann. 
and Mag. 2d. ser. VII. p. 265 (cum descript, animalis). 
p. 58. C. Pearsoni Bens. 1. c. p. 185; Chemn. ed. II. N. 41 1. t. 49. 
f. 34—36. 
