. The Quarterly journal of the Geological Society of London. theshales of Forfarshire be proved, there is no doubt that they are theova of batrachians closely allied to the Ranidce or Frog tribe. The fossil eggs occur in clusters blended with the foliage of ap^parently fluviatile plants. Their forms are in many instances welldefined, and the polygonal depressions or cells left by the bursting * Manual of Elementary Geology, 3rd edition, p. 344. 1852.] MANTELL ON SUPPOSED FOSSIL OVA. 107 and removal of the ova are distinctly shown; and they entirely corre-spond with those in the recent carboniz
. The Quarterly journal of the Geological Society of London. theshales of Forfarshire be proved, there is no doubt that they are theova of batrachians closely allied to the Ranidce or Frog tribe. The fossil eggs occur in clusters blended with the foliage of ap^parently fluviatile plants. Their forms are in many instances welldefined, and the polygonal depressions or cells left by the bursting * Manual of Elementary Geology, 3rd edition, p. 344. 1852.] MANTELL ON SUPPOSED FOSSIL OVA. 107 and removal of the ova are distinctly shown; and they entirely corre-spond with those in the recent carbonized mass from Clapham. Fig. 1 Fig. 2. Fig. Slab of Old Red Sandstone,Forfarshire, with eggs ofBatrUchians ? a. Ova in a carbonized state. b. Egg cells; the ova having been shed. Fig. 2. Eggs of the common Frog,Rana temporaria,/rom a dried-^a f^P pond in Clapham Common. a. Portion of the ovary. b. A transverse section of the mass ex-hibiting the form of the egg-cells. -Devonian Shale, Forfarshire, with impression of Plantsand Eggs of
Size: 2231px × 1120px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1840, booksubjectgeology, bookyear1845
