. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palaeontological science. Paleontology. Fig. 163.—Hemicidaris cre7iularis, showing the great tubercles on which the spines were supported. Middle Oolites. Passing over the Annelides, which, though not uncommon, are of little special interest, we come to the Articulates, which also require little notice. Amongst the Crustaceajis, whilst the little Water-fleas {Ostracoda) are still abundant, the most mark- ed feature is the predominance which is now assumed by the Decapods—the highest of the k
. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palaeontological science. Paleontology. Fig. 163.—Hemicidaris cre7iularis, showing the great tubercles on which the spines were supported. Middle Oolites. Passing over the Annelides, which, though not uncommon, are of little special interest, we come to the Articulates, which also require little notice. Amongst the Crustaceajis, whilst the little Water-fleas {Ostracoda) are still abundant, the most mark- ed feature is the predominance which is now assumed by the Decapods—the highest of the known groups of the class. True Crabs {Brachyura) are by no means unknown; but the prin- cipal OoHtic Decapods belonged to the " Long-tailed " group {Macrura), of which the existing Lobsters, Prawns, and Shrimps are members. The fine-grained lithographic slates of Solenhofen are especially famous as a depot for the remains of these Crustaceans, and a characteristic species from this locality {Eryon arctifo?'7?iis, fig. 164) is here represented. Amongst the air-breathing Ai-ticulates, we meet in the Oolitic rocks with the remains of Spiders {Arac/mida), Centipedes {Myriapoda), and numerous true Insects {Insecta). In con- nection with the last-mentioned of these groups, it is of interest to note the occurrence of the oldest known fossil Butterfly —the PalcKontina Oolitica of the Stonesfield slate—the rela-. 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
