Geological Papers. 243 



need only to say here that its structure is so close to that of some 

 of the Microsauria that the resemblance must be of genetic im- 

 portance. The Micrerpeton caudatum has been proved elsewhere 

 to belong among the Branchiosauria, and this group has been 

 shown to be true amphibians, as we know them to-day. The Am- 

 phibamus is a true microsaurian, and the Molgophis is a side 

 branch of the microsaurians which is known as the Aistopoda, 

 Whether the group is entitled to a distinct ordinal rank is open to 

 question. On the basis, then, of the foregoing discussion, we will 

 here propose the following classification for the class Amphibia: 



Class AMPmBiA. Linne, 1758. Devonian to recent. 



Subclass I. Euamphibia nom. nov. Carboniferous to recent. 

 Branchiosauria. Credner. Carboniferous. 

 Apoda (Gymnophiona). Muller, 1832. Permian (?) to re- 

 cent. 

 Caudata. Dumeril, 1806. Permian (?) to recent. 

 Salientia (Anura). Laurenti, 1768. Eocene to recent. 

 Holospondyli. Sciiwarz, 1908. Carboniferous and Per- 

 mian. 

 Microsauria. Dawson, 1863. Carboniferous. 

 Aistopoda. Miall, 1874. Carboniferous. 

 (?)Diplocaulia nom. nov. Permian. 

 Stegocephala. Cope, 1868. Carboniferous to Upper 

 Triassic (Jurassic?). 

 Order 1. Temnospondylia. Zittel, 1887. 

 Suborder 1. Rhachitomi. Cope. 

 Suborder 2. Embolomeri. Cope. 

 Order 2. Stereospondylia. Zittel, 1887. Capboniferous to Triassic. 



Note. — It is doubtful whether the new order, Diplocaulia, belonp^s in sub- 

 class II or subclass III. This will be definitely settled when Williston's 

 results have been made fully known. Full definitions of these new groups 

 will be given in the Kansas University Science Bulletin for 1909. 



