﻿Report 
  of 
  the 
  State 
  Geologist. 
  

  

  1075 
  

  

  Mantle 
  with 
  four 
  trunk 
  sinuses 
  on 
  each 
  lobe 
  ; 
  of 
  the 
  genital 
  

   glands 
  two 
  pairs 
  lie 
  in 
  the 
  dorsal 
  lobe 
  and 
  four 
  in 
  the 
  ventral 
  

   lobe. 
  Structure 
  and 
  arrangement 
  of 
  the 
  brachia 
  as 
  in 
  

   Terebratulina. 
  

  

  Type, 
  Magellania 
  Jlavescens, 
  Lamarck 
  (sp.). 
  

  

  Distribution. 
  Jurassic 
  — 
  Recent 
  (Arctic, 
  Australo-Zealandian, 
  

   Japanese, 
  Peruvian 
  and 
  Magellanian 
  Provinces). 
  

  

  Dallina, 
  Beecher. 
  1893. 
  

  

  Magellaniiform 
  shells, 
  with 
  long, 
  recurved 
  loop, 
  small 
  cardinal 
  

   process 
  and 
  well 
  developed 
  dorsal 
  median 
  septum. 
  The 
  adult 
  

   condition 
  of 
  the 
  loop 
  is 
  attained 
  by 
  a 
  series 
  of 
  metamorphoses 
  in 
  

  

  Fig. 
  5C0. 
  

  

  Fig. 
  561. 
  

  

  Fig 
  562. 
  Fig. 
  563. 
  

  

  Figs. 
  560-563. 
  Dallina'jeptigera, 
  Lov6n 
  (sp.). 
  

  

  immature 
  conditions 
  resembling 
  successively 
  the 
  mature 
  brachid- 
  

   ium 
  in 
  Platidia, 
  Ismenia 
  and 
  Muhlfeldtia. 
  

  

  Type, 
  Dallina 
  septigera, 
  Loven 
  (sp.). 
  

  

  Distribution. 
  Tertiary 
  — 
  Recent 
  (Arctic, 
  Boreal, 
  Lusitanian, 
  

   Japanese 
  and 
  Transatlantic 
  Provinces). 
  

  

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