. The animal creation: a popular introduction to zoology. Zoology. 356 CYCLOSTOMES. to each other, or to the muzzle in front, and extend backwards on both sides of the abdomen, nearly to the base of the ventral fins. The eyes are placed upon the back of the head. The mouth, the nostrils, and the openings of the branchiae are on the ventral surface of the body; the dorsal fins are situated upon the tail, which is very slender. Our coast furnishes many species. To this family belong The Torpedos, or Electric Rays, celebrated for their power of giving electric shocks. Their electric apparatus con
. The animal creation: a popular introduction to zoology. Zoology. 356 CYCLOSTOMES. to each other, or to the muzzle in front, and extend backwards on both sides of the abdomen, nearly to the base of the ventral fins. The eyes are placed upon the back of the head. The mouth, the nostrils, and the openings of the branchiae are on the ventral surface of the body; the dorsal fins are situated upon the tail, which is very slender. Our coast furnishes many species. To this family belong The Torpedos, or Electric Rays, celebrated for their power of giving electric shocks. Their electric apparatus consists of a mul- titude of vertical membranous tubes placed close together like the cells of a honeycomb : these cells are filled with mucus and largely. Fig, 29 J.—torpedo. supplied with nerves. The Torpedos are less powerfully'electrical than the Gymnoti, but can nevertheless benumb the arm of a per- son touching them, hence they are called Cramp-fishes. They probably use their electrical batteries as a means of obtaining their prey. They are frequently met witli upon oui- southern coasts. Order of Cyclostomes, or Circular-mouthed Chondropterygians. This, the last order of cartilaginous fishes, is characterized by the singular conformation of the mouth. Their body is elongated, naked, and slimy, and they have neither pectoral nor ventral fins ; such are The Lampreys {Petromyzon)* recognisable by seven * irerpos, petros, a stone; fiv^w, myzo, to 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 Jones, Thomas Rymer, 1810-1880. London : Society for Promoting Knowledge
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