114 TERRESTRIAL AIR-BREATHING MOLLUSKS. 



American continent ; also in Astoria, Orejron, which confirms this statement. 

 It is also found in Japan, and thus, like J'ulvus, may l)e considered one of the 

 circumpolar species common to the three continents. 



Jaw as usual in the g-enus. 



Lingual membrane : see Lehmann, Lebcnden Schncckcn, etc., p. 72, PI. X. 



Fig. 23, for description and figure of the European ft)rm. In a specimen from 



Baldwin County, Alabama, I find 25 — I — 25 teeth, with 5 laterals (PI. III. Fig. 



A, the left-hand figure, is an extreme marginal). Lehmann gives 28 — 1 — 28. 



The specimen examined had the dart-sac and dart described in the Euro- 



• 

 pean form. 



Zonites arboreus, Say. 

 Vol. 111. PI. XXIX. Fig. 3. 



Shell umbilicated, depressed, very slightly convex, thin, pellucid ; ej)idermis 

 amber-colored, smooth, shining ; whorls 4-5, with very minute, oblique striae, 

 apparent when viewed with the microscope ; aperture transversely rounded ; 

 j)eristome thin, acute ; umbilical region indented ; und)ilicus moderate, well 

 developed, round, and deep. Greater diameter 5, lesser 4^ mill. ; height, 

 2| mill. 



Helix arbm-ea, Say, Nieh. Encyc, PI. IV. Fig. 4 ; Binney's ed. 5, PI. LXXII. 

 Fig. 5(1816, 1818, 1819). — Eaton, Zool. Text-Book, 193 (1826). — Binney, 

 Bost. Journ. Nat. Hist. III. 422, PI. XXII. Fig. 1 (1810); Terr. Moll., II. 

 235, PI. XXIX. Fig. 3. — DeKay, N. Y. Moll., 30, PI. II. Fig. 10 (1843). — 

 Gould, Invertebrata, 182, Fig. 110 (1841). — Adams, Vermont MoUusca, 

 160 (1842). — Pfeiffeu, Mon. Hel. Viv., I. 95. —Chemnitz, 2d ed., II. 114, 

 Tab. LXXXV. Figs. 33 - 35. — Reeve, Con. Icon., 733. — W. G. Binney, 

 Terr. Moll., IV. IIG. —Morse, Amer. Nat., I. 542, Fig. 30 (1867). 



Helix Ottonis, Pfeiffer, olim, Weigm. Arch., 1840, I. 251. — Binney, Terr. 

 Moll., II. 238, PL XXIX. a, Fig. 3. — W. G. Binney, T. M., IV. 117. 



Hyalina arborea, Morse, Journ. Portl. Soc., I. 14, Fig. 28, PI. VI. Fig. 29 

 (1864). — Tryon, Amer. Journ. Conch., II. 251 (1866). — Gould and Binney, 

 Inv. of Mass., ed. 2, 396 (1870). —W. G. Binney, L. & Fr.-AV. Sh., I. 33 

 (1869). 



Hyalina Ottotiis, Tryon, Amer. Journ. Conch., II. 251 (1866). 



Helix Braver i, Newcomb, Proc. Cal. Acad. Nat. Sci., III. 118 (1864). 



Hyalina Breweri, Tryon, Amer. Journ. Conch., II. 250, PI. IV. Fig. 27 (1866). 

 — W. G. Binney, L. & Fr.-W. Sh., I. 43, p. Qio (1869). 



From Labrador to Texas and on the Rio Chama, and Fort Wingate in New 

 Mexico ; from Florida to Great Slave Lake ; also in Washoe County, Nevada ; 

 in Montana ; the Pacific Province from British Columbia to San Diego. It 

 may thus be said to inhabit all North America. It is also said to be found in 

 Cuba; also in Guadeloupe. 



Jaw arcuate, narrow, with curving, pointed ends ; lower margin smooth, with 

 a wide median projection ; upper margin with a corresponding depression. 



