116 HELICEA. 



pellucida, tenuissime punctulata ; spira depressa ; anfr. 5^ planulati, ulti- 

 inus ad peripheriam obtusissime subangulatus ; angulo candidulo ; aper- 

 tura ovato-lunaris, obliqua, coarctata ; perist. candidum, tenue, reflexum. 

 Diam. 12, alt. 6 mill. (Deshayes.) 



SYNONYMS AND REFERENCES. 



Helix bulbina Deshay'es, in Fer. i. p. 108, pi. Ixxxv. figs. 14-18. 

 Pfeiffer, Mon. Hel. Viv. iii. 201. 



Remarks. This is Deshayes's description of a shell found 

 by him in Ferussac's collection labelled profunda. It may 

 be, perhaps, the young of that species. I have given a fac- 

 simile of one of his outline figures. Pfeiffer repeats his 

 description, not having seen the shell. 



The banks of the Ohio, Mississippi, and Missouri are 

 given as the habitat. 



HELIX DEMISSA Binney vol. ii. p, 232, pi. xlii. fig. 1. 



Helix demissa Reeve, Con. Icon. 



HEIilX LUCIDA Draparnaud vol. ii. p. 2.33, pi. xxii. a, fig. 2. 



Found in Ohio. 



Having sent some of Dr. Ingalls' shells to Pfeiffer, he 

 declares there is no perceptible difference between them 

 and the lucida of Europe. 



HELIX ARBOREA Say vol. ii. p. 285, pi. xxix. fig. 3. 



Helix arborea Say (Binney's ed.) p. 5, pi. Ixxii. fig. 5. 

 Chemnitz, ii. 114, (excl. Ottonis). 

 Pfeiffer, iii. 88, (excl. ditto). 

 Reeve, Con. Icon. No. 733 (1852), excl. syri. 



Mighels (Shells of Maine) declares he can see no differ- 

 ence between this and lucida. 



Pfeiffer, 1. c, unites Ottonis to this species. He quotes 

 arborea from Cuba, but Poey doubts its existence there. 



HELIX ELLIOTTI Redfield vol. iii. p. 23, pi. Ixxvii. fig. 18. 



The description is taken from the New York Lyceum 

 Annals, vi. 170, pi. ix. fig. 10. 



