LIST OF PLATES. 



Plate I. 



Pachytriton brevipes, Sauvg., p. 30, with view of mouth and 

 profile of head. 



Plate II. 



Pig. 1. Hynobius peropus, P>lgr., p. 33. 



1 a. , lower view. 



1 b. , profile of head. 



1 c. , open mouth, 1| nat. size. 



2. Amblystoma jeffersonianum, Green, p. 46, open mouth, 



1£ nat. size. 



3. Amblystoma par oticum, Baird, p. 48, open mouth, 1| 



nat. size. 



4. microstomum, Cope, p. 50, upper view of head, 



1| nat. size. 



4 a. , profile of head, 1| nat. size. 



4 b. , open mouth, 1^ nat. size. 



5. Proteus anguinus, Laur., p. 85, upper view of head. 

 6. , var. carraro?, upper view of head. 



7. , var. zoisii, upper view of head. 



Plate III. 



Fig. 1. Batrachyperus sinensis, Sauvg., p. 37. 



1 a. , lower view. 



1 b. , profile of head. 



1 c. , open mouth, 1 1 nat. size. 



2. Thorius pennatulus, Cope, p. 79, profile of head, x4 

 nat. size. 



