﻿FROM 
  THE 
  BED 
  CRAG 
  OF 
  SUFFOLK. 
  5 
  

  

  appears. 
  The 
  teeth, 
  on 
  the 
  whole, 
  are 
  considerably 
  larger 
  in 
  pro- 
  

   portion 
  to 
  the 
  size 
  of 
  the 
  skull 
  than 
  in 
  Manatus, 
  as 
  well 
  as 
  fewer 
  in 
  

   number, 
  but 
  differ 
  still 
  more 
  fundamentally 
  in 
  presenting 
  a 
  distinction 
  

   in 
  character 
  in 
  the 
  fore 
  and 
  hind 
  part 
  of 
  the 
  series, 
  a 
  division 
  into 
  

   simple 
  premolars 
  and 
  more 
  complex 
  molars, 
  if 
  these 
  terms 
  can 
  be 
  

   correctly 
  employed 
  when 
  we 
  have 
  no 
  knowledge 
  of 
  a 
  succession 
  of 
  

   the 
  teeth. 
  

  

  It 
  will 
  be 
  seen 
  from 
  the 
  foregoing 
  description 
  that 
  the 
  specimen 
  

   presents 
  many 
  characters 
  common 
  to 
  the 
  Manati 
  and 
  the 
  Dugong, 
  

   and 
  others 
  by 
  which 
  it 
  differs 
  from 
  both, 
  the 
  most 
  striking 
  of 
  them 
  

   being 
  the 
  more 
  normal 
  development 
  of 
  the 
  nasal 
  bones 
  and 
  the 
  outer 
  

   wall 
  of 
  the 
  nasal 
  fossae, 
  and 
  especially 
  the 
  dentition, 
  in 
  all 
  of 
  which 
  

   it 
  shows 
  a 
  more 
  generalized 
  condition. 
  From 
  Khytina 
  it 
  is 
  removed 
  

   still 
  further, 
  as 
  that 
  genus 
  is 
  characterized 
  by 
  entire 
  absence 
  of 
  

   maxillary 
  teeth. 
  

  

  It 
  will 
  be 
  necessary 
  now 
  to 
  consider 
  its 
  relation 
  with 
  the 
  extinct 
  

   Sirenians 
  of 
  European 
  Miocene 
  and 
  Pliocene 
  deposits. 
  

  

  These 
  are 
  generally 
  known 
  collectively 
  under 
  the 
  generic 
  name 
  

   Halitherum, 
  Kaup, 
  though 
  several 
  more 
  or 
  or 
  less 
  marked 
  subdivi- 
  

   sions 
  have 
  been 
  established. 
  The 
  genus 
  is 
  characterized 
  by 
  its 
  

   founder, 
  as 
  far 
  as 
  the 
  teeth 
  are 
  concerned, 
  by 
  having 
  "two 
  (as 
  in 
  

   Halicore) 
  tusks 
  in 
  the 
  steeply 
  decurved 
  praemaxillse, 
  and 
  six 
  tubercular 
  

   molars 
  with 
  closed 
  roots, 
  increasing 
  in 
  size 
  from 
  before 
  backwards 
  "*. 
  

   Of 
  the 
  prasmaxillary 
  rostrum 
  or 
  tusks 
  of 
  our 
  present 
  specimen 
  we 
  

   know 
  nothing 
  ; 
  but 
  the 
  general 
  characters 
  of 
  the 
  molars 
  certainly 
  

   correspond 
  with 
  those 
  of 
  Halitherium. 
  In 
  that 
  genus, 
  however, 
  

   theree 
  ar 
  two 
  forms 
  — 
  one 
  to 
  which 
  Professor 
  Capellini 
  has 
  given 
  the 
  

   name 
  of 
  Felsinotherium, 
  founded 
  on 
  a 
  very 
  perfect 
  specimen 
  from 
  

   the 
  Pliocene 
  beds 
  near 
  Bolognaf 
  and 
  including 
  the 
  French 
  Pliocene 
  

   species 
  figured 
  by 
  Gervais 
  as 
  H. 
  Serresil 
  J. 
  From 
  these 
  the 
  present 
  

   specimen 
  decidedly 
  differs 
  in 
  the 
  absence 
  of 
  the 
  deep 
  notch 
  in 
  the 
  

   posterior 
  edge 
  of 
  the 
  palate, 
  in 
  the 
  position 
  of 
  the 
  anterior 
  root 
  of 
  

   the 
  zygoma, 
  which 
  rises 
  from 
  the 
  maxilla 
  opposite 
  to 
  the 
  penultimate 
  

   and 
  antepenultimate 
  molars, 
  whereas 
  it 
  is 
  much 
  further 
  forward 
  in 
  

   the 
  above-mentioned 
  species, 
  and 
  in 
  the 
  larger 
  size 
  and 
  greater 
  

   number 
  of 
  molar 
  teeth, 
  which 
  do 
  not 
  appear 
  to 
  exceed 
  five 
  in 
  either 
  

   the 
  Italian 
  or 
  French 
  species 
  assigned 
  to 
  this 
  group. 
  

  

  On 
  the 
  other 
  hand, 
  it 
  approaches 
  more 
  nearly 
  to 
  H. 
  ScJiinzi, 
  Kaup, 
  

   from 
  the 
  Miocene 
  of 
  the 
  Rhine 
  valley, 
  which 
  appears 
  to 
  have 
  had 
  

   six 
  molars, 
  the 
  first 
  two 
  having 
  single 
  roots. 
  Comparing 
  it, 
  however, 
  

   with 
  Kaup's 
  figures 
  § 
  and 
  with 
  specimens 
  in 
  the 
  British 
  Museum, 
  

   distinctions 
  certainly 
  of 
  specific 
  value 
  can 
  be 
  seen, 
  particularly 
  in 
  

   the 
  superior 
  size 
  and 
  massiveness 
  of 
  construction, 
  in 
  the 
  form 
  of 
  the 
  

   nasal 
  bones 
  and 
  their 
  relation 
  to 
  the 
  upper 
  ends 
  of 
  the 
  praemaxillaB, 
  

   the 
  form 
  of 
  the 
  hinder 
  edge 
  of 
  the 
  palate, 
  and 
  the 
  greater 
  size 
  of 
  

  

  * 
  Beitrage 
  zur 
  naheren 
  Kenntniss 
  der 
  urweltlichen 
  Saugethiere. 
  Zweites 
  Heft 
  

   (1855), 
  p. 
  10. 
  

  

  t 
  "Sul 
  Felsinotherio." 
  Bologna: 
  1872. 
  

  

  J 
  Zoologie 
  et 
  Paleontologie 
  Frar^aisea, 
  2nd 
  ed. 
  (1859), 
  pis. 
  iv. 
  v. 
  and 
  vi. 
  

   Op. 
  cit. 
  

  

  