THE SKULL OF DOLICHOSOMA. 



509 



ther, and forked behind. The premaxillaries (im) resemble those of 

 Siren lacertina. The maxillary (ms) is a strong bone extending to 

 the anterior extremity of the snout, and to the middle of the orbit; 



Fig. 143- 

 Dolichosoma longissimum, upper surface of skull restored, enlarged six times. 



it carries about 15 smooth teeth, which are curved backward: there 

 may have been two rows. The frontal (F) and parietal (Pa) bones 

 are blended into one mass. The frontal terminates in front in three 

 processes. The epiotic bone (Ep) terminates at its outer angle in a 

 knob-like swelling. The teeth of the lower jaw, 20 in number, were 



