NOTES AND EXHIBITS. 145 



The President exhibited for Dr. Ramsay a block of Shale from 

 the Gosford Cutting, on which there appeared, besides Phyllotheca 

 and two fine examples of Cleithrolepis, a tadpole-like form about 

 one inch long, and a quarter in greatest width. The head is 

 remarkably similar to that of Platyceps Wilkinsonii from the same 

 cutting, as described at a recent meeting, though it is not distinct 

 enough for absolute identification. There are evident indications 

 of a dorsal fin extending backwai'ds from the head ; and the 

 posture of the animal compared with that of the accompanying 

 fishes corresponds exactly with that of the other specimen. The 

 whole aspect of the thing suggests the hypothesis that this is really 

 an exceedingly early stage of some Labyrinthodont, perhaps of the 

 very one previously described. 



10 



