﻿1874.] 
  On 
  the 
  Development 
  of 
  the 
  Teeth 
  of 
  the 
  Newt, 
  fyc. 
  93 
  

  

  December 
  10, 
  1874. 
  

   JOSEPH 
  DALTON 
  HOOKER, 
  C.B., 
  President, 
  in 
  the 
  Chair. 
  

   The 
  President 
  announced 
  that 
  he 
  had 
  appointed 
  as 
  Vice-Presidents 
  : 
  — 
  

  

  The 
  Treasurer. 
  

  

  The 
  Duke 
  of 
  Devonshire. 
  

  

  Mr. 
  John 
  Evans. 
  

  

  Eight 
  Hon. 
  Lyon 
  Playfair. 
  

  

  Dr. 
  Sanderson. 
  

  

  The 
  Presents 
  received 
  were 
  laid 
  on 
  the 
  table, 
  and 
  thanks 
  ordered 
  for 
  

   them. 
  

  

  The 
  following 
  Papers 
  were 
  read 
  : 
  — 
  

  

  I. 
  "On 
  the 
  Development 
  of 
  the 
  Teeth 
  of 
  the 
  Newt, 
  the 
  Frog, 
  

   and 
  certain 
  Lizards/' 
  By 
  Charles 
  S. 
  Tomes, 
  M.A. 
  Com- 
  

   municated 
  by 
  John 
  Tomes, 
  F.R.S. 
  Received 
  July 
  23, 
  1874. 
  

  

  (Abstract.) 
  

  

  That 
  the 
  " 
  papillary 
  stage 
  " 
  of 
  tooth-development 
  could 
  not 
  be 
  said 
  

   to 
  at 
  any 
  time 
  exist 
  either 
  in 
  the 
  frog 
  or 
  in 
  certain 
  fish, 
  was 
  pointed 
  out 
  

   nearly 
  twenty 
  years 
  ago 
  by 
  Professor 
  Huxley, 
  who, 
  however, 
  accepted, 
  

   on 
  the 
  authority 
  of 
  Groodsir, 
  the 
  latter's 
  theory 
  of 
  the 
  process 
  as 
  true 
  of 
  

   Man 
  and 
  Mammalia. 
  In 
  more 
  recent 
  years 
  Kolliker 
  and 
  Waldeyer 
  have 
  

   traced 
  out 
  the 
  course 
  of 
  the 
  development 
  of 
  teeth 
  with 
  great 
  accuracy 
  

   in 
  Man 
  and 
  some 
  other 
  Mammalia, 
  with 
  the 
  result 
  of 
  showing 
  that 
  the 
  

   usually 
  accepted 
  views 
  propounded 
  by 
  Goodsir 
  and 
  Arnold 
  are 
  not 
  by 
  

   any 
  means 
  an 
  accurate 
  representation 
  of 
  what 
  takes 
  place 
  in 
  them. 
  

  

  Since 
  the 
  date 
  of 
  the 
  publication 
  of 
  Professor 
  Huxley's 
  paper, 
  I 
  am 
  

   not 
  aware 
  that 
  any 
  thing 
  has 
  been 
  published 
  bearing 
  upon 
  the 
  develop- 
  

   ment 
  of 
  the 
  teeth 
  of 
  Reptilia 
  and 
  Batrachia, 
  save 
  a 
  paper 
  by 
  Dr. 
  Lionel 
  

   Beale 
  upon 
  the 
  development 
  of 
  the 
  teeth 
  of 
  the 
  Newt, 
  and 
  a 
  short 
  and 
  

   inconclusive 
  paper 
  by 
  Santi 
  Sirena; 
  with 
  the 
  exception 
  of 
  the 
  papers 
  

   alluded 
  to, 
  the 
  subject 
  may 
  be 
  taken 
  to 
  stand 
  in 
  the 
  position 
  which 
  it 
  

   occupied 
  at 
  the 
  time 
  of 
  the 
  publication 
  of 
  Professor 
  Owen's 
  ' 
  Odonto- 
  

   graphy,' 
  in 
  which 
  we 
  are 
  told 
  that 
  the 
  teeth-germs 
  of 
  Reptiles 
  and 
  

   Batrachia 
  never 
  stop 
  at 
  the 
  papillary 
  stage, 
  but 
  that 
  the 
  primitive 
  dental 
  

   papilla 
  sinks 
  into 
  the 
  substance 
  of 
  the 
  gum 
  and 
  becomes 
  inclosed 
  by 
  a 
  

   capsule. 
  

  

  The 
  principal 
  facts 
  which 
  my 
  observations 
  enable 
  me 
  to 
  state 
  are 
  : 
  — 
  

   That 
  there 
  is 
  no 
  such 
  thing 
  as 
  a" 
  dental 
  groove 
  " 
  or 
  " 
  dental 
  fissure 
  " 
  

  

  in 
  the 
  Batrachia 
  and 
  Sauria, 
  but 
  that 
  the 
  whole 
  process 
  takes 
  place 
  

  

  beneath 
  an 
  unbroken 
  surface 
  of 
  epithelium. 
  

  

  vol. 
  xxiii. 
  I 
  

  

  