STKUCTUEE OF EEPTILES AND AMPHIBIANS. 
25 
tition of the 'New Zealand Tuatera, as well of its extinct 
European and Indian ally Hyjperodapedon (fig. 8), are likewise 
shown. 
The brain and other internal organs of reptiles are displayed 
in the left half of the wall-case on the north side of this bayy 
in which are also shown the eggs of many species, in some cases 
with the embryo. 
In the right half of the same case are exhibited a number of 
B C 
Fig. 8. — Skull of Hyperodapedon gordoni, from the Triassic Sandstone of Lossie- 
mouth, Elgin, (I nat. size). A, upper surface of skull; B, palatal 
aspect of skull ; C, underside of front of lower jaw ; Pmx, premaxil- 
lary bone; Mx, maxilla rv ; Fl, palatal teeth; Md, lower jaw; 0, orbit; 
iV, anterior nares; ^S", supratemporal fossa; S', lateral temporal fossa. 
preparations showing the external form and internal structure 
of amphibians, living and extinct. The Giant Salamander of 
Japan {Megalohat radius or Cryptobranchus) is represented by a 
! coloured model in plaster, but the Newts, Salamanders, and 
I Frogs are shown in spirit. Very curious is the almost colourless- 
