CLASS AM PHI MA 511 



Family Proteid^e. — With characters of the suborder. 

 Examples: Necturus, Proteus, Typhlomolge. 

 Suborder 2. Meantes (Fam. Sirenidae, Fig. 429). — Sirens. 

 — Tailed Amphibia without hind limbs; three pairs of 

 external gills and three pairs of gill-openings persistent; 

 no eyelids. 



Family Sirenidae. — With the characters of the suborder. 

 Examples: Siren, Pseudobranchus. 

 Suborder 3. Mutabilia (Fam. Salamandrid^e, Figs. 430- 

 433). — Salamanders. —Tailed Amphibia with two 

 pairs of limbs; without gills and generally without 

 gill-openings in adult ; usually with movable eye- 

 lids. 

 Superfamily 1. AmphiumotdejE. — Mutabilia with two 

 pairs of small limbs; sometimes one pair of gill-open- 

 ings; vertebrae amphiccelous ; without eyelids. 



Family Cryptobranchip^e. — With the characters of the 

 superfamily. Examples: Cryptobranchus (Fig. 430), 

 Amphiuma. 

 Superfamily 2. Salamandroide^e. — Mutabilia with- 

 out gills or gill-openings in the adult; with movable 

 eyelids ; vertebrae usually opisthoccelous. The families 

 are distinguished from one another principally by the 

 position of the teeth and the number of toes. 



Family 1. Salamandrid^e. — Examples: Salamandra, 

 Triton (Fig. 431), Diemyctylus. 



Family 2. Ambystomid^e. — Examples: Ambystoma (Fig. 

 432), Chondrotus. 



Family 3. Plethodontid^e. — Examples: Plei 'hod 'on, S 'pe- 

 ter pes, Desmognathus (Fig. 433). 

 Order 3. Salientia (Anura, Figs. 434-436). — Tailless Am- 

 phibia. Amphibia without a tail ; without scales; two 

 pairs of limbs; without external gills or gill-openings in 

 adult. 

 Suborder 1. Aglossa. — Salientia without a tongue; 



