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1886. ] Geology and Faleontology. 545 
anterior end of the dentary, and occupying the entire alveolar 
fractures. The limbs are not long enough nor the claws acute , 
enough to demonstrate arboreal habits, as in the existing 
genus Basiliscus, where a similar crest exists. A ve culiar 
species has been described under the name of Waosaurus claviger 
lowest in position, have an expanse of 260" or ten an 
a quarter inches, while the spine has about the height of 
500™™ (19.75 inches), the body being 60™" long. The animal 
must have presented an extraordinary appearance. Perhaps its 
dorsal armature resembled the branches of shrubs then, as they 
Or, more probably, the yardarms were connected by membrane 
with the neural spine or mast, thus serving the animal as a sail 
they are hollow, as in Ccelacanth fishes, and that the central 
Naosaurus differs from Dimetrodon in the transverse processes 
of the neural spines of the vertebræ. There are three species, 
Which differ as follows : 
Spines of verte 
; bre cylin drical distally ; transverse processes replaced abo ve by 
, tuberosities, / AR = s 
Spines of vertebræ expanded and compressed above. microdus> 
Palatine teeth large, forming a pavement..... Sie deuvceccceats WV. anicr ee 
Palatine teeth much smaller and more widely spaced N. rar ; 
All these species are from the Permian formation of Tex 
Figures of the W. claviger will be published in the Transactions 
ike American Philosophical Society.—Z. D. Cope. 
1 z e ; 
> Edaphosaurus microdus Cope, Proceeds, Amer. Philos. Society, 1884, P. 37+ aS 
