. Catalogue of the chelonians, rhynchocephalians, and crocodiles in the British Museum (Natural History). New ed. By George Albert Boulenger. Chelonia (Genus); Crocodiles; Rhynchocephalia. Skull of Staurotypus salvinii. (From Gray, P. Z. S. 1869.) The two species agree in the following characters :—Vertebral shields not broader than long, not two thirds the width of the costals; an emarginatiou in the posterior border of each of the vertebral and costal shields, corresponding to the three keels which run along the carapace. Head extremely large; a large horny shield covers the upper jaw, anoth
. Catalogue of the chelonians, rhynchocephalians, and crocodiles in the British Museum (Natural History). New ed. By George Albert Boulenger. Chelonia (Genus); Crocodiles; Rhynchocephalia. Skull of Staurotypus salvinii. (From Gray, P. Z. S. 1869.) The two species agree in the following characters :—Vertebral shields not broader than long, not two thirds the width of the costals; an emarginatiou in the posterior border of each of the vertebral and costal shields, corresponding to the three keels which run along the carapace. Head extremely large; a large horny shield covers the upper jaw, another the mandible, and a third the upper surface of the snout; soft parts with small warts ; tympanum indistinct under the thick skin. Wrist and heel with curved band- like lamellae. ilale with a patch of small horny, sharp-edged tubercles on the lower surface of the leg and another under the thigh. Tail with more or less distinct small conical tubercles, forming paired longitudinal series. In S. salvinii the neural plates are seven in number, about as broad as long ; the last is separated from the pygal by the seventh pair of costals; the eighth pair of costals is separated by the pygal, which is either single or divided into a small anterior and a large posterior plate. The hyoplastral bones have a greater share in the formation of the bridge than 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 British Museum (Natural History). Dept. of Zoology; Boulenger, George Albert, 1858-1937. London Printed by order of the Trustees
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectcheloniagenus, bookye
