. Bulletin - United States National Museum. Science. 208 A MANUAL OF AMERICAN LAND SHELLS. Animal (see p. 205) lead-color, darker on head. Jaw very arcuate, of almost uniform breadth, ends blunt; anterior Fig. 218. surface with transverse striie; concave margin simple, with a well-developed, blunt, median projection (Fig. 218), Lingual membrane very broad, composed of 87 rows of Jaw of Zonites fuiiginosus. 129 (64-1-64) loug, slcuder teeth each; centrals tricuspid; laterals 4, bicuspid, in a straight, transverse row; marginals aculeate, in a somewhat crescentic row. Another membrane had 57-1-5
. Bulletin - United States National Museum. Science. 208 A MANUAL OF AMERICAN LAND SHELLS. Animal (see p. 205) lead-color, darker on head. Jaw very arcuate, of almost uniform breadth, ends blunt; anterior Fig. 218. surface with transverse striie; concave margin simple, with a well-developed, blunt, median projection (Fig. 218), Lingual membrane very broad, composed of 87 rows of Jaw of Zonites fuiiginosus. 129 (64-1-64) loug, slcuder teeth each; centrals tricuspid; laterals 4, bicuspid, in a straight, transverse row; marginals aculeate, in a somewhat crescentic row. Another membrane had 57-1-57 teeth (Terr. Moll., V, Plate II, Fig. 1). Genitalia, as well as complete anatomy, figured in Terr. Moll. U. S., I, Plate IX, Fig. 4. There is a peculiar glandular structure around the vagina. The penis sac is long and narrow, tapering above into the vas deferens. The retractor muscle is inserted at about its middle. The genital bladder is large, oval, on a long duct. The peculiar acces- sories to the penis sac of capnodes, Iwvigatus, inornatus, and friahilis are wanting. I have in my cabinet a large reversed specimen. Zonites friabills, W. G. Binney. Shell very globose, transparent, brittle, thin, sometimes thick, shin- FiG. 219. iug, reddish; spire very short, conic; whorls 5, convex, lightly wrinkled, rapidly increasing, the last very large and ventricose; suture moderate; aperture circular, equally high and broad, within bluish and slightly thickened by a very thin white callus; peristome Zonites friahilis. simple, sharp, thin, at its junction with the body-whorl violet-colored and reflected, so as to cover a portion of the small and deep umbilicus; the parietal wall of the aperture is covered with a light violet-colored callus. Greatest diameter 26, lesser 20"""; height, 13""". Helix friaUlis, W. , Proc. Acad. Nat. Sci. Phila., 1857, 187; Terr. Mon.,iv., 106, pi. Ixxx, fig. 2.—Pfeiffer, Mon. Hel. Viv., iv, 346.—Bland, Auu. N.'Y. L
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