﻿246 
  ACTINOPTEKIGII. 
  

  

  Clay, 
  Weymouth. 
  The 
  teeth 
  of 
  the 
  median 
  and 
  inner 
  

   lateral 
  series 
  only 
  are 
  preserved, 
  and 
  each 
  is 
  slightly 
  

   broader 
  than 
  long, 
  with 
  a 
  cingulum 
  at 
  the 
  base 
  of 
  the 
  

   crown 
  which 
  is 
  raised 
  into 
  a 
  comparatively 
  trenchant 
  edge. 
  

  

  Purchased, 
  1871. 
  

  

  The 
  following 
  species 
  have 
  also 
  been 
  imperfectly 
  denned, 
  chiefly 
  

   upon 
  the 
  evidence 
  of 
  the 
  dentition, 
  but 
  are 
  not 
  represented 
  in 
  the 
  

   Collection 
  : 
  — 
  

  

  Gyrodus 
  contiguidens: 
  Pycnodus 
  (Typodus) 
  contiguidens, 
  P. 
  J. 
  

  

  Pictet, 
  Rept. 
  et 
  Poiss. 
  Poss. 
  Jura 
  Neuchatel 
  (1860), 
  p. 
  69, 
  

  

  pi. 
  xvi. 
  fig. 
  1; 
  (?)J. 
  Cornuel, 
  Bull. 
  Soc. 
  Geol. 
  Prance, 
  [3] 
  

  

  vol. 
  xi. 
  (1883), 
  p. 
  23, 
  pi. 
  i. 
  figs. 
  4, 
  5. 
  — 
  Kimmeridgian 
  ; 
  

  

  Neuchatel. 
  (?) 
  Neocomian 
  ; 
  Haute 
  Marne. 
  [Vomer 
  ; 
  

  

  Neuchatel 
  Museum.] 
  

   Gyrodus 
  fabrei, 
  H. 
  E. 
  Sauvage, 
  Bull. 
  Soc. 
  Geol. 
  Prance, 
  [3] 
  

  

  vol. 
  vi. 
  (1878), 
  p. 
  629, 
  pi. 
  xi. 
  fig. 
  2.— 
  Lias 
  ; 
  Nancy, 
  

  

  Prance. 
  [Left 
  splenial.] 
  

   Gyrodus 
  fortisi, 
  G. 
  G. 
  Gemmellaro, 
  Studi 
  Paleont. 
  Pauna 
  Calc. 
  

  

  Terebratula 
  janitor 
  N. 
  Sicilia, 
  pt. 
  i. 
  (1868), 
  p. 
  6, 
  pi. 
  ii. 
  

  

  figs. 
  15-31. 
  — 
  Tithonian 
  ; 
  Pavara, 
  Villabate, 
  N. 
  Sicily. 
  

  

  [Detached 
  teeth 
  ; 
  Geological 
  Museum, 
  University 
  of 
  

  

  Palermo.] 
  

   Gyrodus 
  goweri, 
  Sir 
  P. 
  Egerton, 
  Quart. 
  Journ. 
  Geol. 
  Soc. 
  vol. 
  xxv. 
  

  

  (1869), 
  p. 
  379, 
  figs. 
  1, 
  2.— 
  Middle 
  Jurassic; 
  Culgower, 
  

  

  Sutherland. 
  [Trunk.] 
  

   Gyrodus 
  imitator 
  : 
  Pycnodus 
  imitator, 
  J. 
  Cornuel, 
  Bull. 
  Soc. 
  Geol. 
  

  

  Prance, 
  [3] 
  vol. 
  v. 
  (1877), 
  p. 
  612, 
  pi. 
  xi. 
  fig. 
  11, 
  and 
  ibid. 
  

  

  vol. 
  viii. 
  (1880), 
  p. 
  157, 
  pi. 
  iii. 
  figs. 
  18, 
  19. 
  Cosmodus 
  

  

  imitator, 
  H. 
  E. 
  Sauvage, 
  Bull. 
  Soc. 
  Sci. 
  Nat. 
  Yonne, 
  

  

  vol. 
  xxxiii. 
  (1879), 
  pt. 
  ii. 
  p. 
  49. 
  — 
  Neocomian 
  ; 
  Wassy, 
  

  

  Haute 
  Marne, 
  and 
  Yille-sur-Saulx, 
  Meuse, 
  Prance. 
  [Im- 
  

   perfect 
  splenial.] 
  

   Gyrodus 
  (?) 
  Icevior, 
  L. 
  Agassiz, 
  Poiss. 
  Poss. 
  vol. 
  ii. 
  pt. 
  ii. 
  (1844), 
  

  

  p. 
  233, 
  pi. 
  lxix. 
  a. 
  fig. 
  12. 
  — 
  Porm. 
  & 
  loc. 
  unknown 
  1 
  . 
  

  

  [Bight 
  splenial 
  ; 
  Paris 
  Museum 
  Nat. 
  Hist.] 
  

   Gyrodus 
  larteti 
  : 
  Pycnodus 
  larteti, 
  H. 
  E. 
  Sauvage, 
  Catal. 
  Poiss. 
  

  

  Porm. 
  Second. 
  Boulonnais 
  (Mem. 
  Soc. 
  Acad. 
  Boulogne- 
  

  

  sur-Mer, 
  vol. 
  ii. 
  1867), 
  p. 
  33, 
  pi. 
  ii. 
  fig. 
  1, 
  and 
  Bull. 
  Soc. 
  

  

  Geol. 
  Prance, 
  [3] 
  vol. 
  viii. 
  (1880), 
  p. 
  527.— 
  Portlandian 
  ; 
  

  

  N. 
  Prance. 
  [Imperfect 
  splenials 
  ; 
  Boulogne 
  Museum.] 
  

  

  1 
  An 
  isolated 
  tooth 
  in 
  the 
  Enniskillen 
  Collection 
  (P. 
  3783), 
  said 
  to 
  have 
  

   been 
  obtained 
  from 
  the 
  London 
  Clay 
  of 
  Sheppey, 
  is 
  labelled 
  " 
  Gyrodus 
  Icevior, 
  

   Agass." 
  by 
  Agasaiz. 
  

  

  