. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 200 Mr. F. A. Bather on British Fossil Cn'noids. The Stem attained a length of at least 1L centim. It was round in section, with a width (in 57048) of about 4-5 millim. In the proximal region it is com- posed of ossicles of three sizes, the larger ones slightly pro- jecting, with an average height of *4 millim. (zincotype, fig. 5). In the more distal regions (fig. 10) the ossicles are smooth and more equal in height. ' The sutures are crene- late, indicating radiate striee on
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 200 Mr. F. A. Bather on British Fossil Cn'noids. The Stem attained a length of at least 1L centim. It was round in section, with a width (in 57048) of about 4-5 millim. In the proximal region it is com- posed of ossicles of three sizes, the larger ones slightly pro- jecting, with an average height of *4 millim. (zincotype, fig. 5). In the more distal regions (fig. 10) the ossicles are smooth and more equal in height. ' The sutures are crene- late, indicating radiate striee on the articular surface. The lumen is small, as in Botryocrinus^ and from it there proceed five radial sutures, which are usually visible on the outside right up to the dorsal cup. In the distal region of the stem the pentameres show only a slight tendency to the hexagonal shape and semi-alter- nating arrangement described for Botryocrinus. The distal most end of the Cambridge specimen Fig. part of Stem in is smooth and rounded, and this the larger Dudley Museum though the whole stem and cup specimen of M. loreus. (x are very slightly disturbed. If 3s diam.) this rounding be due to weathering, it would appear to have been accomplished while the creature was yet alive. (PI. XI. fig. 3.) General Remarks on the Genus. In the composition of its cup, in the anal area, and in the simple dichotomy of its arms, this species resembles the species of Cyathocrimis, and, were that genus not more strictly defined than it has hitherto been, it would doubtless be referred thither. On the other hand, there are many points, not hitherto recognized as of great importance, in which the present species resembles a very different assemblage of Crinoids. The shape of the cup, especially of the radials, is the same as that of Botryocrinus. The ventral sac is of the same structure as that of Bendrocrinus, Botryocrinus, and Thenarocrinus; while the general resemblance of the smaller Dudley spe
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