Memoirs of the Museum of Comparative Zoology at Harvard College Volume 36

Memoirs of the Museum of Comparative Zoology at Harvard College Volume 36

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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. 1913 edition. Excerpt: ...narrow, upper angles in front of the pectorals. Origin of first dorsal midway from snout to caudal; base equal in length to snout, or to distance behind the bases of the pectorals, equal to less than one third of the length of the interdorsal space, to about two thirds of the distance between the base of the second dorsal and the caudal, or to the length of the ventral bases. Second dorsal smaller than the first, base equal to about half the distance from the caudal, origin above the ends of the ventral bases. Caudal one fifth of the total, angles not rounded, hind margin of subcaudal deeply and of terminal slightly concave. Intestine of specimen studied with thirty-three turns in the spiral. Total length 106, snout to caudal 84, snout to pectorals 25j, snout to mouth 8i snout to nostrils 2i, and length of caudal 21 inches. Blackish brown. Specimen described from Provincetown, Mass. ECHINORHINIDAE. Body massive, subfusiform. Head depressed. Snout broad, tapering, Eyes without a nictitating fold. Mouth crescentic, with labial folds. Teeth sectorial, similar in the two jaws, cusps oblique, notched at each side at the base. Spiracles small. Two small dorsals, without a spine, above the tail. No anal fin. Dermal armature with scattered tubercles like those of certain Platosomia. ECHINORHINUS. Echinorhinus Blainv., 1816, Bull. Soc. philom., p. 121. Scymnus Cuv., 1817, Reg. anim., 2, p. 131 (part). Goniodus Agass., 1835, Rech. poiss. foss., 3, pi. E. Body longer than the tail, subfusiform. Head depressed; snout tapering, nostrils nearly midway from the mouth. Mouth wide, arched forward, with deep labial folds around the angles. No nictitating membrane. Spiracles minute. Gill openings five, hindmost in front of the pectoral. Two dorsals, close...
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Product details

  • Paperback | 216 pages
  • 189 x 246 x 12mm | 395g
  • United States
  • English
  • Illustrations, black and white
  • 1236791363
  • 9781236791368