400 HELTCID^. 



thus be said to inhaV)it all Eastern North America ; has been lately 

 found in California, and is quoted from Bermuda, Cuba, Jamaica, 

 and Porto Rico. 



Hyalina Binneyana. 



Shell sub-globose, transparent, shining; whorls about four; aperture sub-cir- 

 cular; lip simple; mnbilicated. 



ILjalina Binneijnna, Morse, Journ. Portl. N. H. Soc. i. 13, figs. 25, 26; pi. 6, fig. 27; 



pi. 2, tig. 9 (1S64). — Trvon, Am. Journ. Conch, ii. 252, pi. 4, fig. 31 (1866).* 

 Helix Binneyana, MoKSE, Amer. Nat. i. 542, fig. 32 (1867). 



Shell umbilicated, sub-globose, transparent, almost colorless, shin- 



ing, smooth, with microscopic wrinkles of growth 



Fis. 659. ^^^^ g^-|l more delicate oblique wrinkles ; spire 



not much elevated ; whorls about four, rounded, 



gradually enlarging, the last globose, broadly um- 



H Binnej/atM. biHcatcd bclow ; aperture oblique, sub-circular, 



large ; peristome simple, acute, extremities not 



approaching, that of the columella sub-reflected. Greatest diameter 



four, height two millimetres. 



Southern part of Maine ; also Tawas Bay, Michigan. 



Hyalina exigua. 



Shell depressed, greenish horn colored; Avhorls three and a half; aperture 

 transversely rounded ; lip simple ; umbilicated. 



Helix exigna, Stimpson, Proc. Bost. Soc. iii. 175 (1850). — Gould, Terr. Moll. iii. 16. 



— W. G. BixNEY, Terr. Moll. iv. 102, pi. 77, fig. 19. — Pfeiffer, Mon. Hel. Viv. 

 iii. 102. — Morse, Amer. Nat. i. 543, fig. 34 (1867). 



Helix anmduta, Case, in Sillim. Journ. [2] 1847, iii. 101, fig. 13; Ann. and Mag. Nat. 



Hist. 1847, 338, preoccupied. — Pfeiffer, Mon. Hel. Viv. iii. 103. 

 Helix striatella, junior, teste Gould, Sillim. Journ. iii. 276 (1847). 

 Pseudo-hijnlinn exir/un, Morse, Journ. Portl. Soc. i. 16, pi. 2, fig. 8 ; pi. 7, fig. 33 (1864). 



— Tkyon, Am. Journ. Conch, ii. 265, pi. 4, fig. 57 (1866). 



Shell broadly umbilicated, depressed, pellucid, greenish horn 

 color, marked with delicate revolving lines, and distant longitudi- 

 nal ribs obliquely decussating the incremental strife ; spire scarcely 



*In"Am. Journ. Conch." i. 188, Mr. Tryon pro])oses for this species the specific 

 name Morsci, on account of Helix Binneynna, Pfeiflfor. I have retained Morse's name, as 

 it is not preoccupied in the genus Hyalina. In his first catalogue of Maine Shells Mr. 

 Morse uses the name Binneyi, which can be employed if necessary to distinguish the shell 

 from Pfeiffcr's. — W. G. B. 



