. The Cambridge natural history. Zoology. SCALES 191. FiQ. 108.—A, Scale oi Antennarius hispidus, x 100 ; B, scale of a young Malthe vespertilio, x 100. (After HertAvig.) the result of the curious modifications which their scales undergo. In some of the Coffer-Fishes {Os- tracion) these struc- tures assume the form of polygonal bony plates which'suturally articulate with one another and enclose the trunk in a rigid cuirass, from which the scaleless tail protrudes behind (Fig. 438); while in some Globe- Fishes and Porcupine- Fishes ( Tetrodon, Diodon) the prolongation of the scales into str
. The Cambridge natural history. Zoology. SCALES 191. FiQ. 108.—A, Scale oi Antennarius hispidus, x 100 ; B, scale of a young Malthe vespertilio, x 100. (After HertAvig.) the result of the curious modifications which their scales undergo. In some of the Coffer-Fishes {Os- tracion) these struc- tures assume the form of polygonal bony plates which'suturally articulate with one another and enclose the trunk in a rigid cuirass, from which the scaleless tail protrudes behind (Fig. 438); while in some Globe- Fishes and Porcupine- Fishes ( Tetrodon, Diodon) the prolongation of the scales into strong erectile spines equally well serves the pur- pose of protection (Fig. 439). Most Teleostomi have the scales along the " lateral line " perforated by single or multiple apertures, through which the sensory canal communicates with the exterior. In a few Teleosts scales are entirely absent, as in most Siluridae; or they exist only as microscopic vestiges hidden in the skin, as in Eels; or, as in such naked forms as Antennarius marmoratus and Zepado- gaster, and in some Silu- FiG. 109.—A, Scale of Baiistes capriscus, x 20 ; ridae, they become reduced B, scale of Monacanthus scopas^ x 20. (After fQ mere Daoillae of the Hertwlg.) ' . " dermis. The concentric rings observable (Fig. 105) on the surface of many Teleostean scales are an index to the age of the. 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 Harmer, S. F. (Sidney Frederic), Sir, 1862- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
