. Catalogue of the fossil Reptilia and Amphibia in the British Museum (Natural history) ... By Richard Lydekker ... Reptiles, Fossil; Amphibians, Fossil. CHELONID^. 27 there is a considerable probability that the one family is the descen- dant of the other. Both the nature of the roof over the temporal fossa and the presence of the intergular shield in some CJielonidce appear to be archaic features ; the former, at least, being found to a greater or less extent in the Acichelyidce. The open tympanic ring may likewise be regarded as an archaic feature \ Genus CHELONE, Brongniart2. Including :—C
. Catalogue of the fossil Reptilia and Amphibia in the British Museum (Natural history) ... By Richard Lydekker ... Reptiles, Fossil; Amphibians, Fossil. CHELONID^. 27 there is a considerable probability that the one family is the descen- dant of the other. Both the nature of the roof over the temporal fossa and the presence of the intergular shield in some CJielonidce appear to be archaic features ; the former, at least, being found to a greater or less extent in the Acichelyidce. The open tympanic ring may likewise be regarded as an archaic feature \ Genus CHELONE, Brongniart2. Including :—Cimo\lio]ehelys, Owen 3. Allopleuron, Baur *. Skull (fig. 7) comparatively long, narrow, with the orbits lateral, the nares more or less nearly vertical, and usually no occipital Fig. 7. Ckelone imhricata.—Palatal and frontal aspects of the cranium. Eeduced. (From Boulenger's ' Catalogue of Chelonians.') 1 See Baur, Ann, Mag. Nat. Hist. ser. 6, vol. iii. p. 60 (1889). 2 Bull. Soc. Philom. vol. ii. p. 89 (1800).—Amended. 3 Eep. Brit. Assoc: for 1841, p. 176 (1842). 4 Science, vol. xi. p. 144 (1888).. 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 Geology; Lydekker, Richard, 1849-1915. London, Printed by order of the Trustees
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