﻿Report 
  of 
  the 
  State 
  Geologist. 
  

  

  1029 
  

  

  Peregrinella, 
  (Ehlert, 
  1887. 
  

  

  Shells 
  of 
  large 
  size, 
  pedicle-valve 
  the 
  more 
  convex. 
  Yalves 
  

   without 
  median 
  fold 
  and 
  sinus. 
  Margins 
  even 
  ; 
  surface 
  plicate* 
  

  

  / 
  ~. 
  y 
  v\ 
  

  

  

  I 
  >'-• 
  ~ 
  - 
  i 
  ; 
  ; 
  -i\\.. 
  

  

  p^ 
  

  

  il 
  L 
  

  

  itiip 
  

  

  Figs. 
  438, 
  439.— 
  Peregrinella 
  multicarinata, 
  Lamarck 
  (sp.). 
  (Quexstedt.) 
  

  

  Beak 
  short, 
  scarcely 
  prominent; 
  cardinal 
  area 
  and 
  deltarium 
  

   well 
  developed. 
  

  

  Type, 
  Peregrinella 
  multicarinata, 
  Lamarck 
  (sp.). 
  

  

  Distribution. 
  Cretaceous. 
  

  

  Hemithyris, 
  D'Orbigny. 
  1847. 
  

  

  Shells 
  smooth 
  or 
  faintly 
  plicate; 
  median 
  fold 
  and 
  sinus 
  

   obscure. 
  Beak 
  high, 
  with 
  large 
  triangular 
  pedicle-passage 
  and 
  

   very 
  slightly 
  developed 
  deltidial 
  plates. 
  Teeth 
  prominent; 
  

   dental 
  plates 
  absent. 
  Hinge-plate 
  divided 
  medially, 
  but 
  without 
  

  

  87 
  

  

  