CLASSIFICATIONS OF THE AMPHIBIA. 267 



2. Familia.— ^-Caudata, (Dumeril). 

 Genera. — Triton. Salamandra. Proteus. Siren. 



3. Familia. — Ecaudata, (Dumeril). 

 Genera. — Hyla. Rana. Pipa. Bufo. 



Merrem published his ' Tentamen Systematis Amphibio- 

 rum' in the year 1820, wherein he gave a more extended ar- 

 rangement ; retaining Laurenti's two orders, taken from the 

 modes of progression of the feet, he added Oppel's order, — 

 "Apoda" without feet,— and two new tribes; in which lat- 

 ter he designated those animals that undergo a transforma- 

 tion, and those that do not But it is worthy of remark, that 

 he restricts the first tribe, Mutabilia, to only Salamandra 

 and Molge ; whereas he ought likewise to have included in 

 that tribe all (equally undergoing metamorphoses in their 

 young state) the genera of his second order, and to have pla- 

 ced his Tribus I. — Mutabilia, after " Or do II. — Salientia" 

 and before the " Genera" which would have rendered his 

 classification more perfect. The original is this. — 



AMPHIBIA. 



Classis II.— BATRACHIA. 



Ordo I. — Apoda. Genus. — Ccecilia. 



Ordo II. — Salientia. 

 Genera. — Calamita. Rana. Breviceps. Bombinator. Pipa. Bufo. 



Ordo III. — Gradientia. 



Tribus 1. Mutabilia; i. e. Metamorphosin subeunt. 



Genera. — Salamandra. Molge. 



Tribus 2. Amphipneusta. Metamorphosis nulla. 



G enera. — Pro tens . Siren. 



Latreille, five years afterwards, introduced to the world a 

 still better system, (vide ' Families Naturelles du Regne Ani- 

 mal,' 1825, p. 104), in which he judiciously founded his two 

 natural orders upon the branchia being deciduous in some 

 species, and perennial in others, though in two families he 

 has followed Dumeril ; thus. — 



Seconde Classe. — AMPHIBIES. Amphibia. 



Premier Ordre. — Caducibranches. Caducibranchia. 



Ire. Famille. — Anoures. Anoura, (Dumeril). 



Les Genres. — Pipa. Crapaud. Grenouille. Rainette. 



2nd Famille. — Urodeles. Urodela, (Dumeril). 



Les Genres.— Salamandre. Triton. Axolotl. 



