. Text-book of zoology for junior students. Zoology. ORDE'.IS OF FISHES. 247 The Skates and Rays (Batides) have the branchial openings placed on the imder side of the head, while the body is generally flattened out into a rhomboidal disc, the greater part of which is made up of the enormously developed pectoral fins (fig. 177). In the Skates, as in the Dog-fishes, the eggs are enclosed in leathery capsules, familiarly known as "Mermaid's ; In another section of the Elasmobranchs, typified by the C/iimwra (fig. 176, B), though the internal structure of the gills is the same as
. Text-book of zoology for junior students. Zoology. ORDE'.IS OF FISHES. 247 The Skates and Rays (Batides) have the branchial openings placed on the imder side of the head, while the body is generally flattened out into a rhomboidal disc, the greater part of which is made up of the enormously developed pectoral fins (fig. 177). In the Skates, as in the Dog-fishes, the eggs are enclosed in leathery capsules, familiarly known as "Mermaid's ; In another section of the Elasmobranchs, typified by the C/iimwra (fig. 176, B), though the internal structure of the gills is the same as in the ordinary examples of the order, there is only a single external gill-aperture. The grou]i is therefore spoken of by the name of Ifolocep/iali. Order VI. Dipnoi. The best-known, and until lately the only, forms included in this order, are the very singular Mud-fishes {Lepidosiren), which are of great interest from the many points of aftinity which they exhibit. Fig. I7S.—A, Lepidnnren paradnxa, one of the Murl-fislies ; B, Front of the mouth of the same, showin^^ the teeth ; 0, One of tlie overlapphig .scales, eolarged. to the Ainphihia. The body of the Lepidosireii (fig. 178) is com- pletely fish-like, and is protected by a covering of small, horny, overlapping scales, which have the cycloid characters. There are. 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, American Book Co
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1885
