IIYO-BRANCHIAL APPARATUS OF TYPHLOTRITON. 169 



A summary of the points in which Typhlomolye, Typhlotriton 

 and Spelerpes agree would be somewhat as follows : 



i. All have three branchial bars in the larval form. The so- 

 called adult, but possible larva Typhloinolge, has three. 



FIG. 3. Hyo-branchial apparatus of adult Typhlotriton from below, showing 

 the long projecting ist cerato-branchial. X 6. 



2. The proportions and general position of the parts of the 

 hyo-branchial apparatus are much the same in all. 



3. In the adult forms of Typhlotriton and Spelcrpcs, the first 

 cerato-branchial is very long. 



4. The larvae of Typhlotriton and Spelerpes grow to some size 

 before transforming. 



