. Catalogue of casts of fossils, from the principal museums of Europe and America, with short descriptions and illustrations. Fossils. 90 veetebeata. Order 3 — Cycloids. These osseous Fishes are distinguished by their circular, imbricated, unenarnelled scales with concentric markings. The dorsal fin is spiny, as in the Mackerel, or Soft-rayed, as in the Salmon. This Order is not represented by any species of older date than the Cretaceous epoch. The Chalk has yielded 21 species, and the Tertiary 154. Nearly all belong to extinct genera. Order 4 — Ctenoids. This Order includes the Teleostian Fi
. Catalogue of casts of fossils, from the principal museums of Europe and America, with short descriptions and illustrations. Fossils. 90 veetebeata. Order 3 — Cycloids. These osseous Fishes are distinguished by their circular, imbricated, unenarnelled scales with concentric markings. The dorsal fin is spiny, as in the Mackerel, or Soft-rayed, as in the Salmon. This Order is not represented by any species of older date than the Cretaceous epoch. The Chalk has yielded 21 species, and the Tertiary 154. Nearly all belong to extinct genera. Order 4 — Ctenoids. This Order includes the Teleostian Fishes with comb-like scales, generally of a rounded or ovoid form, and spiny dorsal fin, like the Perch. They were ushered into being along with the Cycloids. Of the 195 fossil forms described, 11 are from the Chalk. No. 346. Beryx SUperbtlS, Dixon. Group, on slab. The genus Beryx, of which there are two existing species in the Australian seas, represented the Perch family during the Cretaceous period. The characteristics are a large, blunt head, one dorsal fin with several spinous rays in front of the soft ones, and large, round, pectinated scales. This specimen was found in the Lower Chalk at Lewes, England, and is in the private Cabinet of S. H. Beckles, Esq., of Brighton, England. Size, 23 x 14. Price, $ No. 347. Holocentrum pygseum, Agass. Skeleton, on slab. This genus, still represented in the Pacific Ocean, be- longs to the same family as Beryx. This species is shorter and stouter than the living one, with a larger head and smaller anal fin. The specimen is from the Middle Eocene beds of Monte Bolca, Italy, and is in the private Geological Cabi- net of Mr. Ward, Rochester. Size, 6x3. Price, $ No. 348. Cololites, Agass. These tortuous and convoluted intestinal-like masses and impressions have been called Luinbricaria, Miinst., from the supposition that they were worm- casts. But Prof. Agassiz considers them the petrified intestines of Fishes or the contents
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectfossils, bookyear1866
