!LäSR II 



BRACHIOPODA 



407 



Fimbriothyris and Epicyrta Deslong. Jura. Camerothyris Bittner. Trias. 



Cincta Quenstedt. Jura. Antiptychina 

 Zittel. Jura. Plesiothyris Douvillö. Jura. 

 These are all European genera. 



l\^^ // ^ Jf \\ 1 Hynniphoria ^uess; ICruratula Bittner; 



I ^ ^ ' * /\ \\ * 1 Orthoidea Friren. 



Fio. 612. 



Microthyrls lagenalls (Schloth.). Cornbrash 

 Rushden, England. Vi (after Davidson). 



Fic. 613. 



Aulacothyris resupinata (Sow.). Middle Lias ; Ilminster, 

 England (after Deslongchamps). 



Siibfamily C. Magellaniinae Beecher. 



Terebratellidae with the loop composed of descending and ascending branches, 

 passing in the higher genera through metamorphoses comparable to the adult structure 



Fig. 614. 



Mayas pumilus Sow. White 

 Chalk ; Menden, near Paris. A,B, 

 Shell, i/i. Ü, Vectical section. D, 

 Interior of dorsal valve. 



Fio. 615. 

 Coenothyris vulgaris (Scliloth.). Muschelkalk ; Wiirzbnrg. A, 

 Dorsal and anterior views, i/i- -ß> Loop enlarged and restored 

 from sections treated with acid (parfcly after Koschinsky). 



of Bouchardia, Magas, Magasella, Terebratella and Magellania. The lower genera 

 become adult before reaching the terminal stages. Jura to Recent. Recent genera 

 restricted to austral seas. 



Bouchardia Davidson (Fachyrhynchus King). Recent ; South Atlantic. 



Magas Sowerby (Fig. 614). Cretaceous ; Europe. Pachymagas von 

 Ihering. Tertiary ; Patagonia. Magasella Dali. Recent. Coenothyris 

 Douville (Fig. 615). Trias; Europe. 



