Natural history of animals; . ted closelytogether. Sharks, or Selachians. These are marine Fishes with a cartilaginous are frequently large, and usually very vary from four to thirty feet in length ; theirteeth are numerous, sharp as lancets, and inflict theseverest wounds. The smaller marine animals, andeven men, fall a prey to them. The Rays, or Skates, are broad and flat, from twoto six feet or more in length and width. Those calledVampires are sometimes sixteen feet wide, and weighseveral tons. One kind, the Torpedo, gives violentelectrical shocks when touched.
Natural history of animals; . ted closelytogether. Sharks, or Selachians. These are marine Fishes with a cartilaginous are frequently large, and usually very vary from four to thirty feet in length ; theirteeth are numerous, sharp as lancets, and inflict theseverest wounds. The smaller marine animals, andeven men, fall a prey to them. The Rays, or Skates, are broad and flat, from twoto six feet or more in length and width. Those calledVampires are sometimes sixteen feet wide, and weighseveral tons. One kind, the Torpedo, gives violentelectrical shocks when touched. See Figures 241, 242. Suckers, or Cyclostomi. The true Suckers are the least perfect and lowest of allthe Fishes, and their tongue moves forwards and back-wards like the piston in a pump, enabling them to pro-duce a vacuum, and thus to fix themselves to otherfishes. The Sea Lamprey, two or three feet long, theHagfish or Myxine, six or eight inches long, and theBrook Lamprey about a foot long, are of this kind. The SHARKS. 37. Fig. 238. —Head ofHammerhead Shark. Fig. 237. —Head of Mackerel Shark.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
