﻿1084 
  $ 
  ORTY- 
  SEVENTH 
  REPORT 
  ON 
  THE 
  8 
  TATE 
  MUSEUM. 
  

  

  situated 
  posteriorly, 
  and 
  the 
  transverse 
  band 
  of 
  the 
  ascending 
  

   branches 
  developed 
  into 
  a 
  broad 
  saddle, 
  the 
  posterior 
  margin 
  of 
  

   which 
  incloses 
  the 
  median 
  septum. 
  

  

  Type, 
  Kingena 
  lima, 
  Def 
  ranee 
  (sp.). 
  

  

  Distribution. 
  Cretaceous. 
  

  

  Lyra, 
  Cumberland. 
  181tf. 
  

  

  Synonym 
  ; 
  Terebrirostra, 
  d'Orbigny, 
  1847. 
  

  

  Plicated 
  shells 
  with 
  the 
  umbo 
  of 
  the 
  pedicle-valve 
  extravagantly 
  

   elongated, 
  terminating 
  in 
  an 
  apical 
  foramen. 
  Deltidial 
  plates 
  

   very 
  large; 
  dental 
  plates 
  highly 
  developed. 
  Loop|as 
  in 
  Tere- 
  

  

  Figs.605-608. 
  Lyra 
  Meadi, 
  Cumberland. 
  (Davidson.) 
  

  

  bratella 
  in 
  immature 
  stages, 
  the 
  connecting 
  lamellae 
  disappearing 
  

   at 
  maturity. 
  

  

  Type, 
  Lyra 
  Meadi, 
  Cumberland. 
  

   distribution. 
  Cretaceous. 
  

  

  Magasella, 
  Dall. 
  1870. 
  

  

  Shells 
  exteriorly 
  as 
  in 
  Terebratella. 
  Brachial 
  valve 
  with 
  a 
  

   highly 
  developed 
  median 
  septum 
  whose 
  anterior 
  extremity 
  is 
  

   elevated 
  and 
  free. 
  Descending 
  branches 
  of 
  the 
  loop 
  attached 
  to 
  

   this 
  septum 
  by 
  broad 
  expansions 
  of 
  the 
  lamellae 
  ; 
  ascending 
  

   branches 
  forming 
  a 
  distinct 
  ring, 
  attached 
  at 
  its 
  base 
  to 
  the 
  

  

  142 
  

  

  