Binney on Terrestrial Mollusks. 67 



en effet, sur sa surface des stries irregiilieres d'accroissement, qui 

 grossissent cm s'approclinni ilc rorabilic, so regulaissent dans cette 

 cavite, et deviennent assez 8enil)lables h, celle qu'on remarque dans 

 quclques solariutn. Cette coquille est raince, diaphane, et d'une cou- 

 leur uniforme, d'un jaune verdatre tres pale. Les stries qui s'en- 

 forpent dans Tintericur de rombilic n'ont pas etc representees assez 

 grosses dans les figures de cette ouvrage, auxquelles nous ren- 

 vojons. 



HELIX JEJUNA Say vol. ii. p. 172, pi. xlii. fig. 2. 



Helix jejuna Say, .Touni. Acad. ii. 158; Binney's ed. p. 9. 



DeKay, N. Y. Moll. p. 40. 



Pfeifker, Mod. Hel. Viv. i. 147; iii. 124. 



Bland, N. Y. Lyceum, vi. p. 341 ; Notes 31. 

 HeUx Mobiliana Troschel, Ar. f. Nat. 1843, ii. 124. 

 Pfeiffer, 1. c. iii. 219. 



This species is not referred to under this name in the 

 second volume of the Mollusks. Of all the authors referred 

 to in the synonymy, none have seen authentic specimens 

 of it. It has been known only by Say's description until 

 within a few months past, when it was suggested to me 

 by Dr. Pfeiffer that it might be identical with Mobiliana. 

 Specimens found at the original locality * by Mr. O. S. 

 Dorman, agree with Say's description sufficiently to con- 

 vince Bland of their identity. Since there is no hope of 

 ever deciding the question with certainty, it appears best 

 to follow the suggestion of these two authors, as that most 

 likely to be correct. 



In notes taken by Dr. Binney at the Jardin des Plantes, 

 it appears that a young shell is there labelled H. jejuna. 



Lea refers to this species in his remarks on several 

 species. As demonstrated by Bland, he had before him 

 clausa under this name. 



Anthony makes Mobiliana a synonym of clausa in his 

 Ohio Catalogue. 



* Mr. Dorman writes that the correct orthography of the spot is Cowford, and 

 not Cowfwi. 



