﻿DISCOGLOSSID^. 
  123 
  

  

  Ordei' 
  ECAUDATA. 
  

  

  Four 
  limbs 
  and 
  no 
  tail. 
  Radius 
  and 
  ulna, 
  and 
  tibia 
  

   and 
  fibula 
  confluent; 
  tarsus 
  (astragalus 
  and 
  calcaneum) 
  

   elongate, 
  forming 
  an 
  additional 
  segment 
  in 
  the 
  bind 
  

   limb. 
  Frontal 
  bones 
  confluent 
  with 
  parietals. 
  

  

  Suh-order 
  PHANEHOGLOSSA. 
  

   Eustachian 
  tubes 
  separated 
  ; 
  tongue 
  present. 
  

  

  Series 
  ^.— 
  ARCIFBRA. 
  

  

  Pectoral 
  arch 
  with 
  the 
  opposite 
  halves 
  moveable, 
  the 
  

   coracoids 
  and 
  prascoracoids 
  connected 
  by 
  an 
  arched 
  

   cartilage 
  (the 
  epicoracoid), 
  that 
  of 
  the 
  one 
  side 
  over- 
  

   lapping 
  that 
  of 
  the 
  other. 
  

  

  Family 
  1.— 
  DISCOGLOSSID^. 
  

  

  Yertebrge 
  opisthocoelous 
  ; 
  short 
  ribs 
  articulated 
  to 
  

   the 
  anterior 
  diapophyses 
  ; 
  diapophyses 
  of 
  sacral 
  

   vertebra 
  dilated. 
  Upper 
  jaw 
  toothed. 
  

  

  The 
  genera 
  combined 
  under 
  this 
  family 
  constitute 
  

   a 
  most 
  interesting 
  and 
  perfectly 
  natural 
  group, 
  as 
  is 
  

   abundantly 
  evidenced 
  by 
  the 
  bony 
  structure, 
  the 
  larval 
  

   characters, 
  &c. 
  

  

  That 
  they 
  occupy 
  the 
  most 
  lowly 
  position 
  among 
  the 
  

   Ecaudata^ 
  and 
  show 
  the 
  nearest 
  approximation 
  to 
  the 
  

   Caudata, 
  is 
  another 
  point 
  on 
  which 
  there 
  can 
  be 
  no 
  

   question. 
  The 
  opisthocoelous 
  vertebra3 
  with 
  distinct 
  

   ribs, 
  the 
  increased 
  number 
  of 
  carpal 
  and 
  tarsal 
  ele- 
  

   ments, 
  the 
  non-extrusible 
  tongue, 
  the 
  presence 
  of 
  the 
  

   azygos 
  (posterior 
  cardinal) 
  vein 
  discovered 
  by 
  Hoch- 
  

   stetter 
  in 
  Bowhinatoi\ 
  and 
  since 
  shown 
  by 
  Howes 
  to 
  be 
  

  

  