334: 



THE BUNTER-SANDSTEIN". 

 Fiff. 425. 6 



[Ch. XXII. 



Ceratites nodosus. Muschelkalk. 

 a. Side view. 6. Front vie^. 



c. Partially denticulated outline of the septa dividing the chambers. 



bivalve shells, the Fosidonia minicta, Goldf. [Posidonomya minuta, 

 Bronn) (see fig. 426), is abundant, ranging through theKeuper, Muschel- 

 kallv, and Bunter-sandstein ; and Avicula socialis, fig. 427, having a 

 similar range, is very characteristic of the Muschelkalk in Germany, 

 France, and Poland. 



Fiff. 426. 



Fosidonia viinuta, a. Avicula socialis. h. Side view of same. 



Goldf. {Posidn- Characteristic of the Muschelkalk. 



nomya minuta, 

 Bronn.) 



The abundance of the heads and. stems of lily encrinites, JSncrinus 

 Fig. 428. liliiformis, fig. 428 (or Encrinites moniliformis), show 



the slow manner in which some beds of this hmestone 

 have been formed in clear sea-water. The star-fish 

 called Aspidura loricata (fig. 429) is as yet peculiar 



Fia 



Encrinus liliiformis, Schlott. Syn. E. movAUformis, 



Body, arms, and part of stem. 



a. Section of stem. 



Muschelkalk, 



Aspidura loricata, Agas, 

 a. Upper side. 

 &. Lower side. 

 Muschelkalk, 



