216 HISTORICAL PALZONTOLOGY. 
the fore-feet, and to which the 
name of Labyrinthodonts was ap- 
plied in consequence of the 
complex microscopic structure of 
the teeth (fig. 149). In the essen- 
tial details of their structure, the 
Triassic Labyrinthodonts did not 
differ materially from their pre- 
decessors in the Coal-measures 
and Permian rocks. ‘They pos- 
sessed the same frog-like skulls 
(fig. 150), with a lizard-like body, 
a long tail, and comparatively 
feeble limbs. ‘The hind - limbs 
were stronger and longer than 
the fore-limbs, and the lower 
| | . 
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a 
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Bain 
Fig. 148.—Footprints of a Labyrinthodont (Cheirvotherium), from the Triassic Sand- 
stones of Hessberg, near Hildburghausen, Germany, reduced one-eighth. The lower 
figure shows a slab, with several prints, and traversed by reticulated sun-cracks : the 
upper figure shows the impression of one of the hind-feet, one-half of the natural size. 
(After Sickler.) 
~ 
