Report on the Deep-Sea Fishes Collected by H.M.S. Challenger Volume 5, V. 22

Report on the Deep-Sea Fishes Collected by H.M.S. Challenger Volume 5, V. 22

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1887 edition. Excerpt: ...an extremely narrow band, and laterally a single series; vomerine teeth present, and similar. The upper part of the head is much compressed, narrow, hollow, and bordered on each side by a serrated ridge. The two ridges slightly converge behind, and are continued as a pair of humeral ridges, which terminate behind in a strong and acute spine. On the side of the head the ridges of the praeoperculum are very distinct, the posterior and inferior meeting at a right angle, and the angle being armed with a slender claw-like spine, which points downwards. Also the lower margin of the mandible is finely serrated, and terminates behind in a short and obtuse spine. N ostrils in front of the upper part of the eye, separated by a very narrow bridge of skin, the posterior being much wider than the anterior.' Branchiostegals five. The gill-membranes overlapping the isthmus free. Gill-rakers rather numerous, closely set, long and slender; pseudobranchiw present. The dorsal fin is preceded by a minute forked spine, and composed of eleven soft rays. A well-developed adipose fin, which is about half as long as the rayed dorsal, occupies the middle of the space between dorsal and caudal. Anal fin with fourteen rays. Caudal fin composed of some thirty-five rays, some of which occupy the upper and lower edges of the tail. Pectoral inserted low down on the side, composed of about fourteen very slender rays, and pointing forwards, not backwards. The lower edge of the abdomen is convex and denticulated, the ventrals being inserted in front of the vent, close together, and in a vertical position. None of the scales have been preserved, but to judge from the pouches, which are distinctly visible, they must have been large, and numbering perhaps thirtytwo, in...show more

Product details

  • Paperback | 148 pages
  • 189 x 246 x 8mm | 277g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236821084
  • 9781236821089