400 HELICID^E. 



thus be said to inhabit all Eastern North America ; lias been lately 

 found in California, and is quoted from Bermuda, Culm, 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, ti<,^. 9 (1864). — Tkyon, Am. Jouni. Conch, ii. 252, pi. 4, fig. 31 (1866).* 

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



Shell umbilicated, suli-jxlobose, 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 Binneyar^^T^ billcated below ; 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; -whorls three and a half; aperture 

 tran.sversely rounded; lip simple; umbilicated. 



Helix exigna, Stimpson, Proc. Eost. Soo. 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, Amor. 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. 

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

 Pseudo-hynlina exigua, 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 striae ; spire scarcely 



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

 name Morsei, on account o^ Helix Binneyana, Pfcififcr. 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 Binnryi, which can be employed if necessary to distinguish the shell 

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



