The fifth order, Chelonia, consists of four families:—

57. TestudinidæLand and fresh-water Tortoises.
58. ChelydidæFresh-water Turtles.
59. TrionychidæSoft Turtles.
60. CheloniidæSea Turtles.

AMPHIBIA.

In the Amphibia I follow the classification of Professor Mivart, as given for a large part of the order in the Proceedings of the Zoological Society for 1869. For the remainder I follow Dr. Strauch, Dr. Günther, and a MSS. arrangement kindly furnished me by Professor Mivart.

The class is first divided into three groups or orders, and then into families as follows:—

Order I.—PSEUDOPHIDIA.

Fam.
1. CæciliadæCæcilia.

Order II.—BATRACHIA URODELA.

2. SirenidæSiren.
3. ProteidæProteus.
4. AmphiumidæAmphiuma.
5. MenopomidæGiant Salamanders.
6. SalamandridæSalamanders and Newts.

Order III.—BATRACHIA ANOURA.