﻿Yol. 
  53.] 
  ROCKS 
  AND 
  FOSSILS 
  EROM 
  FRANZ 
  JOSEF 
  LAND. 
  497 
  

  

  the 
  umbilicus 
  are 
  of 
  the 
  same 
  size 
  as 
  those 
  near 
  the 
  back. 
  Now, 
  in 
  

   all 
  the 
  larger 
  specimens 
  of 
  A. 
  Tchefhini 
  available 
  for 
  comparison, 
  

   the 
  ribs 
  around 
  the 
  umbilicus 
  are 
  distinctly 
  larger 
  than 
  those 
  on 
  the 
  

   back, 
  and 
  only 
  one 
  third 
  or 
  perhaps 
  one 
  fourth 
  as 
  numerous. 
  The 
  

   figures 
  of 
  A. 
  TcTiefkini 
  given 
  by 
  De 
  Verneuil 
  x 
  and 
  Nikitin 
  2 
  show 
  

   this 
  same 
  character. 
  

  

  In 
  the 
  Museum 
  of 
  Practical 
  Geology 
  there 
  are 
  several 
  specimens 
  

   from 
  the 
  Kellaways 
  Rock 
  of 
  Chippenham 
  which 
  come 
  very 
  near 
  to 
  

   the 
  Arctic 
  ammonites, 
  and 
  these 
  have 
  been 
  regarded 
  as 
  a 
  variety 
  of 
  

   A. 
  Marice. 
  

  

  Ammonites 
  (Cadoceeas) 
  modiolaris, 
  Luid. 
  (PI. 
  XXXIX. 
  figs. 
  7- 
  

   10.) 
  

  

  The 
  specimens 
  from 
  this 
  locality 
  referred 
  to 
  the 
  above 
  species 
  are 
  

   two 
  fragments 
  of 
  whorls, 
  which 
  show 
  the 
  lobes 
  and 
  saddles 
  very 
  

   clearly, 
  and 
  in 
  form 
  and 
  markings 
  agree 
  closely 
  with 
  examples 
  of 
  

   A. 
  modiolaris 
  from 
  the 
  Kellaways 
  Rock 
  (figs. 
  7 
  & 
  8). 
  A 
  cast 
  

   from 
  the 
  umbilicus 
  of 
  one 
  of 
  these 
  fossils 
  also 
  agrees 
  with 
  this 
  

   species, 
  and 
  there 
  is 
  a 
  similar 
  cast 
  from 
  the 
  talus 
  of 
  the 
  western 
  end 
  

   of 
  Cape 
  Flora 
  which 
  just 
  fits 
  the 
  umbilicus 
  of 
  one 
  of 
  the 
  Kellaways 
  

   Hock 
  specimens 
  in 
  the 
  Museum 
  of 
  Practical 
  Geolog3^. 
  

  

  One 
  specimen 
  from 
  the 
  talus 
  near 
  Elmwood 
  (PI. 
  XXXIX, 
  

   fig. 
  9), 
  embedded 
  in 
  ironstone 
  and 
  partly 
  crushed, 
  so 
  as 
  to 
  give 
  

   the 
  appearance 
  of 
  a 
  sharp 
  back, 
  has 
  a 
  much 
  wider 
  umbilicus 
  than 
  

   is 
  usual 
  in 
  A. 
  modiolaris 
  ; 
  but 
  as 
  this 
  agrees 
  with 
  the 
  figures 
  given 
  

   by 
  Prof. 
  S. 
  Nikitin 
  of 
  a 
  specimen 
  from 
  Elatma, 
  3 
  which 
  is 
  regarded 
  

   as 
  A. 
  modiolaris, 
  the 
  Cape 
  Flora 
  specimen 
  is 
  likewise 
  referred 
  to 
  

   this 
  species. 
  

  

  Another 
  specimen, 
  from 
  below 
  where 
  the 
  rock 
  was 
  found 
  in 
  situ, 
  is 
  

   more 
  compressed, 
  and 
  in 
  this 
  respect 
  somewhat 
  resembles 
  A. 
  Elatma} 
  4 
  ", 
  

   but, 
  while 
  the 
  ribs 
  are 
  quite 
  as 
  strong 
  as 
  in 
  the 
  latter 
  species, 
  

   there 
  is 
  no 
  evidence 
  of 
  the 
  large 
  tubercles 
  around 
  the 
  umbilicus. 
  

  

  A 
  better-preserved 
  example 
  of 
  this 
  variety 
  was 
  obtained 
  from 
  the 
  

   side 
  of 
  the 
  glacier 
  at 
  the 
  west 
  point 
  of 
  Cape 
  Flora 
  (PI. 
  XXXIX, 
  

   fig. 
  10). 
  

  

  Ammonites 
  (MACROCEPHALiTEs)MACROCEPHALtrs,Schloth. 
  (PL 
  XXXIX, 
  

   figs. 
  1-3.) 
  

  

  The 
  specimens 
  from 
  the 
  present 
  locality 
  referred 
  to 
  this 
  species 
  

   are 
  not 
  good, 
  but 
  a 
  much 
  better 
  example 
  is 
  that 
  received 
  in 
  

   the 
  earlier 
  consignment 
  and 
  noted 
  by 
  Mr. 
  G. 
  Sharman 
  in 
  the 
  

   Geographical 
  Journal, 
  5 
  a 
  further 
  examination 
  of 
  which 
  has 
  convinced 
  

   us 
  that 
  it 
  is 
  the 
  true 
  A. 
  macrocejiJialus 
  (fig. 
  1). 
  In 
  these 
  specimens 
  

   the 
  ribs 
  pass 
  directly 
  outward 
  from 
  the 
  small 
  umbilicus, 
  and, 
  after 
  

  

  1 
  ' 
  Geologie 
  de 
  la 
  Eussie 
  cl'Europe,' 
  vol. 
  ii. 
  (1845) 
  pi. 
  xxxv. 
  

  

  2 
  Mem. 
  Acad. 
  Imp. 
  Sci. 
  St. 
  Petersb. 
  ser. 
  7, 
  vol. 
  xxviii. 
  (1881) 
  no. 
  5, 
  pi. 
  hi. 
  

  

  3 
  Nouv. 
  Mem. 
  Soc. 
  Imp. 
  Nat. 
  Moscou, 
  vol. 
  xv. 
  (1885) 
  pi. 
  xi. 
  fig. 
  48. 
  

  

  4 
  Nikitin, 
  op. 
  cit. 
  vol. 
  xiv. 
  (1881) 
  pi. 
  xi. 
  fig. 
  21. 
  

  

  5 
  Vol. 
  vi. 
  (1895) 
  p. 
  518. 
  

  

  Q. 
  J. 
  G. 
  S. 
  No. 
  212. 
  2 
  l 
  

  

  