Manual of Conchology, Structural and Systemic; with Illustrations of the Species ...

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author, 1918
 

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33. oldal - ... of the length of the shell; margin sharp, with a narrow contraction in the sub-margin, beneath which is a thickening within, on which are the labial teeth ; teeth eight, five primary and three secondary; of the former the largest is on the penultimate whorl, the next largest on the left side of the aperture ; at the base, beginning at the left hand, is a primary, then a secondary, a primary, a secondary, a primary, and another secondary, extending nearly to the upper extremity of the right margin...
58. oldal - ... uniting with the superior termination of the labium ; inferior tooth placed upon the columella, and extending nearly at a right angle with the preceding ; labrum tridentate, teeth placed somewhat alternately with those of the labium, inferior tooth situated at the base and immediately beneath the inferior tooth of the labium. Length about one-tenth of an inch.
43. oldal - Dripping Spring, Organ Mountains (Cockerell); Florida Mountains, Luna Co. (Ferriss and Pilsbry). B. ash-muni is distinguished by the strong development of the angulo-parietal lamella, which bends far to the right at its inner end, the very deep immersion of the lower palatal and basal folds, the continuation of the columellar lamella upon the parietal wall, alongside the parietal lamella, and the longer, usually more gibbons, "neck
53. oldal - As the name implies, G. corticaria is often found crawling upon trees a foot or two from the ground. While generally distributed, it rarely occurs in abundance, and is not known from the higher Catskills, southern Alleghanies, or other elevated regions. So far as I have seen specimens, its western limit is in Minnesota, Iowa and Arkansas. No local or geographic races have been noticed. Submenus IMMERSIDENS Pilsbry & Vanatta Iiinnvrxidcns Pils.
44. oldal - The parietal lamella is sigmoid, bending far to the right at its inner end. The angular lamella, also sigmoid, runs from the peristome to the parietal lamella, the two lamellae together forming a figure like the letter )•. The columellar lamella is broad and horizontal far within, but near the aperture it runs out upon the parietal wall, where it appears as a more or less elevated cord between the parietal lamella and the columella, occupying, therefore, the place of an infraparietal lamella. These...
44. oldal - ... lamella is broad and horizontal far within, but near the aperture it runs out upon the parietal wall, where it appears as a more or less elevated cord between the parietal lamella and the columella, occupying, therefore, the place of an infraparietal lamella. These lamellae are well shown in fig. 30 b, a basal view in which the base of the shell has been removed. The upper palatal fold is short, situated some distance within the mouth, but visible from in front. The lower palatal is long, entering,...
13. oldal - ... stand upon a white palatal callous, and a suprapalatal plica is usually developed. Except in G. armifera, the columellar lamella is horizontal in front and curves towards the base within. The lip is thin and expanded.
33. oldal - Ontario and Maine to Virginia and Alabama, west to South Dakota and Kansas, southwest to Arizona, but not known from the southeastern Atlantic states, Virginia to Florida
25. oldal - Shell narrowly perforated, turrited-cylindrical, vitreous \^T whitish), very minutely striate, shining ; apex rather pointed ; whorls 5, regularly increasing, well rounded, especially the upper ones, the last somewhat narrowed and a little ascending towards the aperture, compressed at the base but not carinated, at some distance from the outer margin provided with an oblique, rather prominent, acute crest corresponding in direction to the lines of growth, extending from the base to the suture, formed...
152. oldal - for last year, but it is larger, more cylindrical, and has one tooth more in the aperture. From P. Avanica it differs by less closely wound whorls and by the inward dentition of the aperture. It appears to be a very rare species. I found one specimen under the bark of a cocoa-nut tree on Penang, and two others on the opposite coast in the Wellesley Province.

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