An illustrated and descriptive catalogue of recent bivalve shells, forming an appendix to the Index testaceologicus [by W. Wood]. |
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An Illustrated and Descriptive Catalogue of Recent Bivalve Shells, Forming ... Sylvanus Hanley,W Wood No hay ninguna vista previa disponible - 2016 |
Términos y frases comunes
Anatina angular angulated anterior slope anteriorly arcuated attenuated beaks bluish broad brown brownish cardinal teeth Chemnitz chesnut colour compressed concentric Conch Conr convex crenated crenulated curved cuticle Cytherea decussated denticles depressed Desh dorsal edge elevated elongated epidermis equivalve extremity flattened fulvous gaping Gmel Gray grooved heart-shaped hinge margin incurved inequilateral inequivalve inside white interstices irridescent Lamarck lamellæ lateral teeth ligamental edge longitudinal lower valve lunule nacre white narrow nearly smooth nearly straight numerous oblique Oblong Obovate obsolete obtuse orbicular oval Ovate pale pellucid Philippines posterior side posteriorly rounded prominent purple purplish radiating ribs radiating striæ rays reddish Reeve rufous shell short slightly species spots straightish striated subequilateral Suborbicular sulci thick thickish thin tinged tooth transverse striæ triangular truncated tumid Turt umbo umbonal slope umbones undulated upper valve ventral edge ventral margin ventricose violet whitish wrinkled yellow yellowish
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Página 188 - Shell rather thin, beaks placed about one-fourth of the length from the posterior extremity, ligament very narrow, anterior lunule distinct and obsoletely ribbed; basal margin slightly shortened; epidermis brownish; an obtuse, slightly elevated rib from the beaks to the anterior basal margin; lateral tooth rectilinear, rounded at the end, and parallel to the base; nacre very brilliant.
Página 71 - ... Shell more or less triangular and compressed, always longer than it is high, regular, equivalve, very inequilateral, posterior side shorter than the anterior ; umbones but little prominent, and nearly vertical ; hinge composed of two cardinal teeth, sometimes upon both valves, sometimes upon one only, and one or two lateral teeth more or less distant ; ligament external, short and swollen ; muscular impressions rounded, united by a pallial impression, which is straight and very much excavated...
Página 8 - Phila., 7:236; pl. 18, fig. 5. Shell elongated, with eight accessory valves, two of which are on the basal margin, extending nearly its entire length; anterior side gibbous, with the concentric lines lamellar, crowded, undulated and crossed by numerous impressed lines; valves much contracted sub-medially, with an oblique groove ; umbonal slope angulated ; posterior side with elevated laminae; extremity truncated; apophysis oblique, dilated; hinge margin within greatly thickened posteriorly. Length,...
Página 60 - Suboval, rlattish, much sloping on the anterior side, semistriated, and semi.pellucid, hinge with two teeth in one valve, and one in the other, pale yellow ; longitudinally radiated with pink ; half an inch long and three fourths of an inch broad.
Página 10 - Shell very thin, rather hyaline, transverse, ventricose; inside pearly; posterior side short, sometimes very short, rounded: anterior side more or less elongated, gaping; upper edge also gaping a little ; hinge with a small rather elongated, triangular pit, and a marginal lamina in each valve, to the outer part of which is attached the rather short external ligament. Muscular impressions two; these, as well as the muscular impression of the mantle, in which there is a large sinus, are indistinct.
Página 164 - Shell subtriangular, oblique, concentrically wrinkled, and longitudinally marked with numerous, hardly perceptible striae ; posterior margin very short and very obtusely rounded, a submarginal impressed line ; anterior margin very oblique and but slightly arcuated ; umbo placed far back ; within perlaceous, polished, edge strongly crenated ; teeth of the hinge robust, the posterior series very distinct and regular.
Página 151 - Shell somewhat oblique, very thick and ponderous, with from twenty-five to twentyeight ribs, each marked by an impressed line ; interstitial spaces equal to the width of the ribs ; umbones very prominent; apices remote from each other, and opposite to the middle of the hinge, spaces between them with longitudinal lines as prominent as their corresponding teeth ; anterior margin cordate, flattened, distinguished from the disk by an abrupt angular ridge ; posterior e'dge rounded, very short ; inferior...
Página 12 - Shell sub-elliptical, ventricose, with numerous prominent, slightly undulated, concentric striae ; a slight furrow extends from beak to base ; posterior side with radiating striae ; obsolete or wanting on the posterior slope; umbo prominent; posterior side short; cardinal tooth very erect, dilated, bi-marginate.
Página 4 - ... slightly wrinkled concentrically, the wrinkles regularly rounded towards the extremity ; hinge margin nearly rectilinear; basal margin a little arquated ; anterior tip rounded; posterior tip obliquely truncated, a little reflected, and rounded near the base ; hinge terminal ; teeth one in each valve, each having a flattened vertical surface, which turns upon that of the opposite tooth ; epidermis pale green.
Página x - TURTON'S MANUAL OF THE LAND AND FRESHWATER SHELLS of the BRITISH ISLANDS. A New Edition, thoroughly revised and with considerable Additions. By JOHN EDWARD GRAY, Keeper of the Zoological Collection in the British Museum.