The Osteology of Dallia pectoralis. >51 
There is a cartilaginous area between the pterotic and the sphenotic 
on the lower surface of the cranium; another at the junction of the 
SO. e20 ep 
Fig. A. Cranium. 
bo basioceipital. e ethmoid. exo exoceipital. ep epiotice. f frontal. p parietal. 
pf prefrontal. pt pterotic. s sphenoid. so supraoceipital. 
The dark shaded portions represent cartilage. 
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