

Trachystoma. 



1 



Pkoteida. 



Amphiumida. 



Menopomida. 



Salamandrida. 



Skull. 



1 



(Elongated. 



Elongated. 



Elongated. 



Broad. 



Broad. 



FruemaxillEe and 

 Dentaries. • 



Armed with horny 

 plates. • 



Dentigerous. 



Dentigerous. 



Dentigerous. 



Dentigerous. 



Prsemaxillse. 



Ananchylosed. 



Ananchylosed. 



Anchylosed. 



Ananchylosed. 



Separate or Anchylosed 



Maxillse. 



Rudimentary or Absent 



Absent. 



Large. 



Large. 



Large. 



Nasal Bones, 



Absent. 



Wanting. 



Large. 



Large. 



Present. 



Palatines. 



Small Oval and beset 

 with dents en brosse. 



With a single row of 

 teeth . 



Absent. 



Wanting. 



Present in young, but 

 changing relation in 

 adult. 



Pterygoid. 



Absent. 



United with Palatines. 



Elongated. 



Very broad. 



Present or absent. 



Prefrontals. 



Wanting. 



Wanting. 



Present. 



Present. 



Present or wanting. 



Two Anterior Cer- 

 atohyals. 



Vertebrae. 



Distinct. 

 Amphiccelous. 



Connate. 

 Amphicoelous. 



Connate. 

 Amphiccelous. 



Amphiccelous. 



Amphi- or Opisthocce- 

 lous. 



Carpus and Tarsus 



Cartilaginous, the latter 

 wanting. 



Cartilaginous 



Cartilaginous. 



Cartilaginous. 



Cartilaginous orOsseous 



Branchial Arches 



4 Persistent. 



3 Persistent. 



4 Persistent. 



M ay be reduced to lst&2d 



1st and 2d Persistent. 



Pelvic Arch and 

 Limbs. 



Absent. 



Developed. 



Developed though small 



Well developed. 



Well developed. 



Anterior Meta- 

 carpal Bones. 



5 



3 



3. 



4. 



4 



Phalanges of 4th 

 Finger. 





1 



1. 



3. 



3 



Eyelids. 



None. 



None. 



None. 



Two. 



Two. 



Inner Layer of 

 Choroid. 





Cartilaginous. 





Cartilaginous. 



Wanting. 



