46 



defined find figured. Throughout England and the Continent of Europe, 

 this bed is also a well-marked Saurian band. Churchdown does not form 

 an exception, the shales there have yielded several reptilian remains, but 

 most of them in too perishable a state to determine specifically. Of these 

 I have exhumed a good tooth of Teleosaurus, and part of the scapular arch 

 or coracoid of Pterodactylus, from the shales. Coprolites are common, as 

 as are also remains of a Crustacean, referred by naturalists to the genus 

 Cohia, of the order Podophthahiia ; the individuals are crushed and 

 dislocated, fragments of the carapace and pincers lie strewn throughout 

 the shales. Of fish we have disinterred a host of fragments, but of whole 

 specimens very few. My friend, Mr. Powell Symokds, was lucky 

 enough to find in the fish-bed proper, a whole specimen of Leptolepia 

 concentricus. The same fish we have met with in the shales. The others 

 perfect enough to be determined are Tetragonolepis ovalis, and species of 

 Dapedius and Pachycormus. The last profusely scattered, both fin and scale. 



A small Echinus of about three lines in diameter, is not unfrequently 

 met with, either in casts, or sometimes and more rarely with the test 

 itself, though too fragile to be extracted. The long pin-like spines 

 belonging to this urchin (1|" in length), are generally lying near it; 

 with great care they may be detached and mounted for microscopic 

 examination, when they form objects of exquisite beauty, and are seen to 

 be delicately serrated. 



Before continuing my observations, I will insert a list of the fossils of 

 the zone. 



PossiLs Of THE Zone of A. Communis (Churchdown'i : 

 Pterodactylus bone (coracoid) Ammonites serpentinus, Rein. 



Teleosaurus tooth — <= communis. Sow. 



Leptolepis concentricus. Eg. var. anguinus 



Tetragonolepis ovalis, Eg. — var. annulatus 



Pachycormus, species var. angulatus 



Dapedius, species ■ Uneatus, d'Orb. 



Coleia (perhaps the Thrissops micro- Brood 



podius of Agassis) Belemnites tubularis, Y. and B. 

 Acrosalenia crinifera, Wright (B. acuarius, Schloth.) 

 Pentacrinus gracilis, Charlsw, Belemnosepia, osselet 

 Ammonites Margaritatus, Montf. pigment-bags 



Jurensis, Ziet. Aptychus Lythensis, Pictet. 



bifrons, Brug. Aptychi of the group Comei, Pictet. 



Baquinianus, $ Orl, Eostellaria trifida (Alalia of ifoms 



(= A. crassus, Phil., according and Lyeett) 

 to Marcou) Turbo capitaneus, Miinster 

 Lythensis, Y. and B. Rhynchonella pygmoea, Morris 



