. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palaeontological science. Paleontology. Fig. 143.—Aspidura loricata, a Triasbic Ophiuroid. Muschelkalk, Germany. highly characteristic of the Muschelkalk. The remains of Articulate Animals are not very abundant in the Trias, if we except the bivalved cases of the little Water-fleas {Ostracoda), which are occasionally very plentiful. There are also many species of the horny, concentrically-striated valves of the EsthericB (see fig. 122, b), which might easily be taken for small Bivalve ]\Ioll
. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palaeontological science. Paleontology. Fig. 143.—Aspidura loricata, a Triasbic Ophiuroid. Muschelkalk, Germany. highly characteristic of the Muschelkalk. The remains of Articulate Animals are not very abundant in the Trias, if we except the bivalved cases of the little Water-fleas {Ostracoda), which are occasionally very plentiful. There are also many species of the horny, concentrically-striated valves of the EsthericB (see fig. 122, b), which might easily be taken for small Bivalve ]\Iolluscs. The ''Long-tailed" Decapods, of the type of the Lobster, are not with- out examples, but they become much more numerous in the succeeding Jurassic pe- riod. Remains of insects have also been discovered. Amongst the Mollusca we have to note the disappearance, amongst the lower groups, of many characteristic Palaeozoic types. Amongst the Polyzoans, the characteristic " Lace- corals," Fefiestel/a, Retepora,'^ Synodadia, Folypora, &c., have Fig. 142. —Head and upper part of the column of Enc7-i>ius iiliiforinis. The lo\\-er figure shows the articulating surface of one of the joints of the column. Muschelkalk, Germany. * The genus Retepora is really a recent one, represented by living forms ; and the so-called Rcteporce of the Palaeozoic rocks should properly receive another name {Phyllopora\, as being of a different nature. The name Retepora has been here retained for these old forms simply in accordance with general Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Nicholson, Henry Alleyne, 1844-1899. New York, A. L. Fowle
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Keywords: ., bookcentur, bookdecade1870, booksubjectpaleontology, bookyear1876
