GENERAL STRUCTURE AND ORDERS. 



1033 



from the Karoo system of South Africa ; Bothriceps, from the Lower 

 Mesozoic of Australia ; and Rhinosaurus, from the Jurassic of the 

 Ural Mountains. There is frequently a lyra on the skull, but this 



Fig. 962. — a, Oral view of palate, much reduced, b, Tooth, natural size, of Baj>hetes planiceps ', 

 from the Carboniferous of Nova Scotia. 



is wanting in Micropholis, as in Dendrerpeton. It is probable that 

 a young skeleton from the Lower Mesozoic Hawkesbury beds of 

 New South Wales, described under 

 the preoccupied name of Platyceps, 

 belongs to Bothriceps. 



Family Anthracosaurid^e. — In 

 this family the vertebral column is 

 fully ossified in the adult ; the teeth 

 are deeply infolded ; the mucous 

 canals between the orbits and the 

 nares form a lyre-shaped pattern 

 known as the lyra ; and the ventral 

 surface of the body typically has a 

 covering of bony scutes. The skull 

 may be parabolic, but is usually tri- 

 angular. This family may be divid- 

 ed into three subfamilies. The first, 

 or Baphetince, is represented solely 

 by the genus Baphetes, of the Car- 

 boniferous of Nova Scotia, which 

 can only be provisionally placed in 

 this family. It is only known by 

 the imperfect skull (fig. 962), which 

 is broad, and rounded anteriorly. 



In the Loxommatince (Chauliodo?itia), the members of the one genus 

 Loxomma attain a large size, and are characterised by the triangular 

 skull (fig. 963), which has large posterior projections, with the lyra 

 forming two straight grooves, continued posteriorly as ridges. The 

 teeth are compressed, large, and irregular, with the foldings deeper 



Fig. 963. — Upper view of the skull of 

 LoxoiH7)ta Allmanni ; from the Carbon- 

 iferous of Durham. Reduced. Letters 

 as in fig. 958. (After Miall.) 



