﻿HYLA. 
  255 
  

  

  form 
  and 
  the 
  var. 
  meridionalis.* 
  We 
  have 
  here 
  to 
  

   deal 
  with 
  a 
  similar 
  case 
  as 
  offered 
  by 
  Eana 
  esculenta, 
  

   and 
  I 
  have 
  adopted 
  the 
  same 
  course, 
  viz. 
  reduced 
  the 
  

   various 
  forms 
  to 
  the 
  rank 
  of 
  varieties. 
  

  

  Skeleton. 
  — 
  Skull 
  feebly 
  ossified. 
  A 
  very 
  large 
  

   fontanelle 
  above, 
  bordered 
  on 
  the 
  sides 
  by 
  the 
  narrow 
  

   fronto-parietal 
  bones 
  ; 
  ethmoid 
  short, 
  its 
  upper 
  lamina 
  

   obtusely 
  pointed 
  or 
  rounded 
  in 
  front 
  and 
  penetrating 
  

   between 
  the 
  nasals, 
  which 
  are 
  small 
  and 
  separated 
  from 
  

   each 
  other. 
  Squamosal 
  feeble, 
  with 
  short 
  zygomatic 
  

   branch. 
  Yomers 
  small, 
  separated 
  or 
  narrowly 
  in 
  

   contact 
  on 
  the 
  median 
  line 
  ; 
  palatines 
  well 
  developed 
  ; 
  

   pterygoid 
  small, 
  the 
  three 
  branches 
  about 
  equal 
  in 
  

   length, 
  and 
  widely 
  separated 
  from 
  the 
  palatine; 
  para- 
  

   sphenoid 
  J_- 
  shaped, 
  pointed 
  in 
  front, 
  reaching 
  to 
  be- 
  

   tween 
  the 
  palatines. 
  Mento-Meckelian 
  bones 
  distinct. 
  

  

  Hyoid 
  a 
  short 
  cartilaginous 
  plate, 
  much 
  broader 
  

   than 
  long, 
  with 
  moderately 
  slender 
  cornua 
  and 
  no 
  

   anterior 
  processes, 
  very 
  short 
  postero-lateral 
  processes, 
  

   and 
  long, 
  slender 
  bony 
  styles 
  (thyrohyals) 
  posteriorly. 
  

  

  Vertebral 
  column 
  twice 
  to 
  twice 
  and 
  one-third 
  as 
  

   long 
  as 
  the 
  skull. 
  First 
  cliapophysis 
  slender 
  and 
  hori- 
  

   zontal 
  or 
  directed 
  slightly 
  forwards 
  ; 
  second 
  much 
  

   longer 
  and 
  expanded 
  at 
  the 
  end, 
  somewhat 
  similar 
  in 
  

   shape 
  to 
  the 
  sacral 
  diapopbysis; 
  third 
  to 
  eighth 
  slender 
  

   and 
  subequal 
  in 
  length 
  ; 
  the 
  third 
  and 
  fourth 
  directed 
  

   backwards, 
  the 
  fifth 
  horizontal, 
  the 
  sixth 
  and 
  seventh 
  

   directed 
  forwards. 
  Sacral 
  vertebra 
  with 
  moderately 
  

   dilated 
  diapophyses, 
  and 
  two 
  condyles 
  for 
  articulation 
  

   with 
  urostyle. 
  Latter 
  a 
  little 
  shorter 
  than 
  the 
  rest 
  of 
  

   the 
  vertebral 
  column, 
  without 
  transverse 
  processes 
  at 
  

   the 
  base. 
  

  

  Praecoracoids 
  slender, 
  strongly 
  curved, 
  entering 
  the 
  

   glenoid 
  cavity 
  ; 
  coracoids 
  nearly 
  straight, 
  dilated 
  

   towards 
  the 
  epicoracoid 
  ; 
  omosternum 
  and 
  sternum 
  car- 
  

   tilaginous 
  ; 
  supra-scapula 
  partially 
  ossified. 
  Humerus 
  

  

  * 
  I 
  have 
  specimens 
  of 
  the 
  latter 
  from 
  Tangier 
  which 
  show 
  a 
  slight 
  

   but 
  distinct 
  indication 
  of 
  the 
  lateral 
  streak, 
  and 
  are 
  thus 
  intermediate 
  

   between 
  H. 
  meridionalis 
  and 
  II. 
  savignyi. 
  

  

  