400 HELTCID^. 



thus be said to inhabit 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 ; umbilicated. 



Hyalina Binnei/ana, Morse, Journ. Portl. N. H. Soc. i. 13, figs. 25, 26; pi. 6, fig. 27; 



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

 Helix Binneyana, Mouse, Amur. Nat. i. 542, fig. 32 (1867). 



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

 ing, smooth, with microscopic wrinkles of growth 

 ^'"' ^^ ■ and still more delicate oblique wrinkles ; spire 



not much elevated ; whorls about four, rounded, 

 gradually enlarging, the last globose, broadly um- 

 H Binneya^. " biUcatcd 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 exifjua, Stimpson, Proc. Best. Soc. iii. 175 (1850). — Gould, Terr. Moll. iii. 16. 



— W. G. BiNNEY, Terr. j\Ioli. iv. 102, pi. 77, fig. 19. — Pfeiffer, Mon. Hel. Viv. 

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



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



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

 HpIIx striatella, ')i\n\or, teste Gould, Sillim. Journ. iii. 276 (1847). 

 Pseudo-hyalina exirjiia, Morse, Journ. Portl. Soc. i. 16, pi. 2, fig. 8 ; pi, 7, fig. 33 (1864), 



— Tryon, 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 strise ; spire scarcely 



*In"Am. Journ. Conch." i. 188, Mr. Tryon proposes for this species the specific 

 name Morsel, on account of Helix Binneyana, Pfeiffer. I have retained Morse's name, as 

 it is not preoccu])ied in tlie genus Hyalina. In his first catalogue of Maine Shells Mr. 

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

 from Pfeiffer's. - W. G. B. 



