SECTION B.] NORTH AMERICAN CONCHOLOGY. 



501 



[Contributions to Concliology. ] 



Page. 



205 Remarks on certain Helices which are described and figured in the 

 Conchologia Iconica for Oct. 1851 : by Prof. C. B. Adams. 



Page. 



205 Hells patina Ad. 



205 acuta Lam. 



205 Chemnitziana Pfr. = H. 



fiuctuata Ad. 



205 Helix ingens Ad. 



205 Bainbridgei Pfr. 



206 lucerna Miill. 



206 Helix tumida Pfr. 

 206 tunicata Ad. 

 206 Chittyana Ad. 

 206 valida Ad. 

 206 anomala Pfr. 



No. 11. 

 Oct. 1S52. 



207 Hints on the geographical distribution of Animals, with special 

 reference to the Mollusca : by Prof. C. B. Adams. 



215 Catalogue of the Terrestrial Shells of St. Thomas, West Indies: by 



215 

 21G 

 216 

 216 

 216 

 216 

 216 



216 

 216 



216 



217 



217 

 217 



213 



219 

 219 

 219 



220 

 220 



Thomas Bland, F. G. S., London. 



Heliz depicta Grat. 218 



plicaria Lam. 

 squamosa Fer. \^Fcr. 



Bulimus baeticattis (Helix) 



badiosus (Helix) Fer. 

 Pupa decumana(Helix)Fer. 

 Cylindrella gracilicollis 



(Helix) Fer. 

 Mangeri (Helix) Wood. 

 Cyclostoma Antillarum Sh. 

 Mejidomastoma Anlillaruvi 

 Gray. 

 Ne-wcombianum Ad. 

 C. Swiftiunuvi Ad. 

 Troscheii Ad. 

 Newcombianum Ad. 

 Helicina subfusca Mke. 

 Ilel. roliilina Mich. 

 castanea Gould? 

 Ilornhecldi Phil. 

 snhfmtcd Kiist. 

 ? (sp. ined.) 



Cylindrella pallida (Bra- 

 chypus) Guild. 

 '! • (sp. ined.) 



221 

 221 



221 



221 

 222 

 222 

 222 

 222 



223 

 223 

 223 

 223 

 224 



Achatina octona Chemn. 

 Bidimiis octona Lam. 



? (&p. ined.) 



? iota Ad. 

 Bulimus exilis( Helix) Gnui. 

 B. Gii(i(ltiloiij)C7isis Brug. 

 var B trifasciatus Pfr. 

 virgulatus (Ccchlogena) 

 /-'. /•. 

 L>. Caribheonum Lam. 

 ? Dysoni Pfr. 



? (sp. ined.) 



? subula (Achatina) Pfr. 

 B. Iivrteiisis Ad? 



? (sp. ined.) 



? (sp. ined.) 



Pupa servilis ? Gould. 

 Succinea Sagra? Orb. 

 Helix incerta (Helicostyla) 

 //. /Im>, Rv(^ [F^r. 



nemoralina Pet. 



? (sp. ined.) 



? (sp. ined.) 



? peraffinis Ad. 

 ? (sp. ined.) 



