S5c£jdf)iopoben. 197 



wk bei Terebratula truncata , ciiidfligen, obcr an t^ret 

 83aftS (jabetformtg gcfpaltcncn) imgcglicbertcn, gewim^er^ 

 Un iini? [piralformig cjewimbcncn IMppen. 



ß r fit c D r b n u n g. 



©ejlteltc (Pedoncules), Pedunculata. 



2)a0 SI;ier ft^jt miftclfl einel ©tielä auf» 



©le i d^flapp ige (E(jui valves), Aec[uivalYia, 



^k Älappm ber ©d;ale ftnb glcic^. 

 2)a*o ®cfd;(. Lingula. 



3 w e 1 1 e S ^ wi i I i c. 



Ungtetd^Etapptge (Ineejuivalves), Inaequivalvia. 



2)ie Älappeii bcr ©djale finb üon ung(eid;er ®v6pe. 

 £)aa ®efd)(. Terebraiula. 



Swcitc Orbnung. 



3(ufft§ente (Sessiles), Sessilia, 



35a§ 3;(;ier fi^t mit bcr untern Ätappc feiner ©d()as 

 le öuf. 



Srjlc gamilic. 



^eflft^enbe (Fixivalves ) , Fixivalvia. 



2Ü){c ©efd;l. Orbicula *), Crania, Acardia (Ostracites, 

 la Peyr. , Radioliies , Lam,)? Sphaerulites ? 



♦) Ucbec ba§ ©efc^Iedit Discina oon Camarcf fefje man bte S5e« 

 cbacf)titngcti pon ©owerbi) in feinem SBerf the gener. of 

 rec. and foss. Shells, fusc. 12 j unb Über baß ©cfdjtfttt 

 Orbicula ; Schumacher , Nouv, Syst. des vers test. 

 p. 176. 



