﻿Report 
  of 
  the 
  State 
  Geologist. 
  

  

  1083 
  

  

  Terebratella, 
  d'Orbigny. 
  1847. 
  

  

  Synonym 
  ; 
  Waltonia, 
  Davidson, 
  1850. 
  

  

  Shells 
  biconvex, 
  oval 
  ; 
  surface 
  plicate, 
  rarely 
  smooth. 
  Cardinal 
  

   area 
  more 
  or 
  less 
  distinctly 
  defined 
  on 
  the 
  pedicle-valve 
  ; 
  foramen 
  

   large, 
  deltidial 
  plates 
  usually 
  not 
  united 
  at 
  maturity. 
  Dental 
  plates 
  

   and 
  sometimes 
  a 
  faint 
  median 
  septum 
  are 
  present. 
  Brachial 
  valve 
  

  

  Figs. 
  601, 
  60 
  J. 
  Terebratella 
  dorsata, 
  Grnelin 
  (sp.); 
  showing 
  the 
  mature 
  ;and 
  ->n 
  immature 
  

   condition 
  of 
  the 
  loop. 
  (Davidson.) 
  

  

  with 
  prominent 
  cardinal 
  process 
  and|dividedjhinge-plate. 
  Loop 
  

   long 
  and 
  recurved, 
  the 
  descending 
  processes 
  joined 
  with 
  the 
  median 
  

   septum 
  by 
  a 
  pair 
  of 
  lateral 
  lamellse 
  passing 
  obliquely 
  backwards. 
  

  

  Type, 
  Terebratella 
  dorsata* 
  Gmelin 
  (sp.). 
  

  

  Distribution. 
  Jurassic 
  — 
  Recent 
  (Australo 
  Zealand 
  ian, 
  Cali- 
  

   fornian, 
  Peruvian 
  and 
  Magellanian 
  Provinces). 
  

  

  Kingena, 
  Davidson. 
  1852. 
  

   Synonym 
  ; 
  Kingia, 
  Schloenbach, 
  1867. 
  

  

  Shell 
  subglobose, 
  smooth 
  or 
  tuberculated. 
  Foramen 
  circular, 
  

   deltidial 
  plates 
  rudimentary. 
  Pedicle-valve 
  with 
  dental 
  plates; 
  

  

  Figs 
  603,604. 
  Kingena 
  lima, 
  Dtfrance 
  (sp.). 
  (Woodward.) 
  

  

  brachial 
  valve 
  with 
  broad 
  cardinal 
  process 
  and 
  a 
  median 
  septum. 
  

   Loop 
  long, 
  recurved, 
  as 
  in 
  Tekkbe 
  Stella, 
  but 
  with 
  the 
  dorsal 
  band 
  

  

  * 
  On 
  pp. 
  15, 
  17 
  and 
  76 
  this 
  species 
  is 
  erroneously 
  referred 
  to 
  as 
  Terebratalia 
  dorsata. 
  

  

  141 
  

  

  