Aistopoda and Branchiosauria. 
71 
Sub-order Aistopoda. 
In this sub-order the body is snake-like without legs, and 
there is neither a pectoral nor pelvic girdle ; the centra of the 
vertebras are elongated, and the neural spines aborted. It 
includes Dolichosoma and Ophiderpetum (Huxley) from the coal 
of Ireland and the Permian of Bohemia. 
Sub-order Branchiosauria. 
These are short-tailed salamander-like Labyrinthodonts 
with barrel-shaped centra, and a notochordal canal through 
their vertebrae. 
The family Apateonidj: includes Melanerpetum from Bohemia; 
and the family Protritonidjs the genera Protriton of Gaudry 
from the Lower Permian of Autun, and Bohemia ; Sparodus and 
Daivsonia also from the last-named locality. 
Among doubtful Labyrinthodonts may be recorded here, 
Bepidotosaurus DuJJii from the M. Permian of Midderidge, 
Durham. Some of the Ichnites (Footprints) were doubtless 
made by Amphibians ; they are mentioned under that head in 
Gallery No. 11 . (see infra , p. 98 of this Guide, Fig. 94). 
Wall-case, 
No. 11. 
Table-case 
No. 23. 
Table-case, 
No, 24. 
Wall-case, 
No. 11. 
