Contributions to British palæontology : or, First descriptions of three hundred and sixty species and several genera of fossil Radiata, Articulata, Mollusca, and Pisces from the Tertiary, Cretaceous, Oolitic, and Palæozoic strata of Great Britain. . persistent tube) ; 72 PALEOZOIC CORALS AND FORAMINIFERA. diameter of the adult little more than an inch^ and which itattains at two inches long, remaining nearly cylindrical afterthat length; surface closely striated longitudinally, about fifteenstrise in one-fourth of an inch, corresponding in number withthe radiating lamellae : horizontal section
Contributions to British palæontology : or, First descriptions of three hundred and sixty species and several genera of fossil Radiata, Articulata, Mollusca, and Pisces from the Tertiary, Cretaceous, Oolitic, and Palæozoic strata of Great Britain. . persistent tube) ; 72 PALEOZOIC CORALS AND FORAMINIFERA. diameter of the adult little more than an inch^ and which itattains at two inches long, remaining nearly cylindrical afterthat length; surface closely striated longitudinally, about fifteenstrise in one-fourth of an inch, corresponding in number withthe radiating lamellae : horizontal section, inner area rathermore than one-third the diameter, of small, closely blended,vesicular plates; outer area with 180 radiating lamellae, ninetyof which reach from the wall to the edge of the inner area, andninety intermediate ones only reach half way; intermediatetransverse vesicular plates very delicate : vertical section, innerarea defined by rather thick walls; it consists of minute, com-pressed, elongate cells, arranged in transverse curved rows,the convexity of the curve upwards; outer area, large cellularstructure, inclining upwards and outwards. Rather common in the carboniferous limestone of Derbyshire.{Col. University of Cambridge.). Strephodes (M^Coy), n. g. Etym. arpe^co, torqueo (from the twisting of the lamellaeabout the centre). (Strombodes pars of Lonsdale, not of Schweigger.) Gen. Char. Corallum simple and conic, or compound and form-ing rounded masses ofinseparably united poly-gonal cells; in either casethe terminal cup is deepwith numerous equal, ra-diating lamellae, conver-ging fi-omthe walls to thecentre, where they meetand are complicated,usually twisted in bun-dles about an imaginaryaxis ; vertical section,small vesicular struc-ture, the rows of cells ar-ranged in a semiellipticalcurve, convexity down-wards, descending fromthe sides at a steep angleand rounding under thecentre, where the-^cells Strephodes: a. vertical section and ternii-are a little larg
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectpaleontology, bookyea
