820 GEOLOGY OF THE BEISTOL COAL-FIELD. 



obtained from only one pound of stone. A description of the 

 Bryozoa bed will be found in tbe Ann. Kat. Hist., 1861, p. 486. 

 The chief bulk of the fossils are joints of the arms of Encrinites. 

 All of them are very minute, the larger Entrochi from the stems 

 having been washed away, just as in a heap of pebbles, the larger 

 ones roll to the bottom. 8o here we find the outside of the bank 

 on the opposite side of the river. There we find the particles 

 much larger, mixed with good sized Product(B, and sometimes the 

 tooth of a Fsammodus or Cladodus, 



The following are fossils that are always present, and may be 

 obtained at any time : — 



Cenopora rhomhifera (Goldf.); Platycrinus loevis (Mill.); 

 Poteriocnnus uacobus f (AvLBt.); ZeperdUza Okeni (Knnst.); Cypridina 

 ovalis (Stod.); Cytherella lunata (Stod.) ; Naticopsis plicistria 

 (McCoy.), (Young); Productus (Sp ?); Spirorhis triangulatus (Stod.); 

 Fsammodus porosus (Ag.) : Cladodus conicus (Ag.) 



7. — [453]. — Palate led. This is a breccia 5 feet above the 

 Bryozoa bed, full of fish teeth and coprolites with shells, &c. 

 Yery good specimens may be easily obtained, . especially from 

 weathered portions. "When seen in a freshly made section of the 

 rock, this palate bed has a greyish brown colour, but on exposure to 

 the air it soon changes into a dark reddish brown from oxidation of 

 the iron. The bed is three or four inches in thickness, and lies 

 on eighteen inches of greyish marl. The principal fossils are : — 



Discina nitida (Lam.) ; Lingula mytiloides (Dav.) ; Naticopsis 

 plicistria (McCoy.) ; Conularia quadrisulcata (Mill.) ; Loxonema 

 rugifera (Phill.) ; Cladodus conicus (Ag.) ; Chomatodus linearis (Ag ) ; 

 PLelodus levissimus (Ag.) ; Psammodus porosus (Ag.) ; rugosus (Ag.) 



8. — [495]. — Camarophoria led. — This is a 6 inch dark coloured 

 bed of limestone containing in great numbers — 



Camarophoria glolulina (King.) ; Athyris Poyssii (Daj.), lamellosa 

 (Day.); Petzia radialis (Phill.); Naticopsis plicistria (McCoy.); 

 Spirifera duplicicostata (Dav.) 



9. — [506.] — Buchiana led is one of grey limestone from 12 to 20 

 inches in thickness, and is one mass of mollusca cemented togethe 



