SO AMPHITTMID^E. 



Fam. 2. AMPHIUMID^J. 



Amphiumidse, Gray, Ann. Phil. 1825. 



Tritonides, Tschudi, Classif. d. Balr. 



Proteidese, part., Tschudi, I. c. 



Proton opsidaa, Ainphiumidae, Gray, Cat. Batr. Grad. 



Atr^toderes, part., Trematoderes Amphiurnides, Dum. 8f Bibr. Erp. 



Gen. ix. 

 Amphiumidse, Protonopsidae, Cope, Journ. Ac. Philad. (2) vi. 1866. 

 Ichthyodea, part., Strauch, Rev. d. Salam. 



Synopsis of the Genera. 



Digits 4 — 5 ; no spiraculum 1. Megalobatrachus, p. 80. 



Digits 4 — 5 ; spiraculum present. ... 2. Cryptobranchus, p. 81. 



Digits 3 — 3 or 2 — 2 ; spiraculum present. 



3. Amphiuma, p. 82. 



1. MEGALOBATRACHUS. 



Megalobatrachus, Tschudi, Batr. p. 96. 



Cryptobranchus, part., Van der Hoeven, Proc. Zool. Soc. 1838, p. 25. 



Sieboldia, Bonap. Faun. ltd. ; Gray, Cat. p. 52. 



Tritomegas, Dum. 8f Bibr. ix. p. 163. 



Tongue covering the floor of the mouth, entirely adherent. A 

 strong series of vomerine teeth between the choanae, parallel with 

 and close to the intermaxillary and maxillary teeth. ISo spiraculum 

 or gill-openings. Two branchial arches. Digits 4 — 5. 



Japan ; China. 



1. Megalobatrachus maximus. 



Sieboldia maxima, Gray, Cat. p. 52. 

 Salamandra maxima, Schley. Faun. Japan, p. 127, pis. 6-8. 

 Megalobatrachus sieboldii, Tschudi, I. c. 

 Cryptobranchus japonicus, Van der Hoeven, I. c, and Tijdschr. v. Nat. 



Gesch. en Physiol, iv. p. 375, pi. v. a. f. 5, 6 ; Ilyrtl, Monoyr. 1865. 

 Sieboldia maxima, Bonap. I. c. 

 Tritomegas sieboldii, Dum. tyBibr. p. 164. 

 Sieboldia davidiana, Blanchard, C. It. Ac. Paris, 1871, lxxiii. p. 79; 



Gray, Ann. 8f May. N. H. (4) xii. p. 188. 



Habit very stout. Head large, broad, much depressed ; snout 

 rounded ; nostrils very small, at the end of the snout, near the labial 

 border ; eyes extremely small, Body squat, depressed. Limbs short, 

 stout ; fingers and toes short, depressed ; outor fingers and toes and 

 fibula bordered with membranes. Tail short, strongly compressed, 



