XI. 



STONESFIELD FISHES. 



179 



Gyronchus oblongus. 

 Pycnodus Bucklandi. 



didymus. 

 Hugii. 



latirostris. 



obtusus. 



ovalis. 



parvus. 



,, rugulosus. 



trigonus. 

 Scaphodus heteromorphus. 



These teeth are often found in their proper 

 > relative place, lying in the stone with no trace 

 of the bone to which they were attached. 



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Diagram XXXIX. Pycnodont Fishes of Stonesfield. 



i. Pycnodus rugulosus. Ag. 2. Pycnodus Hugii. Ag. 3. Pycnodus ovalis. Ag. 

 4. Pycnodus Bucklandi. Ag. (A lateral row of teeth.) 5. Pycnodus Bucklandi. 

 Ag. (A lateral row of teeth.) 6. Pycnodus didymus. Ag. 7. Gyrodus trigonus. 

 Ag. a. One of the outside teeth, b. One of the intermediate teeth, c. One of the 

 middle row of teeth. 8. Gyronchus oblongus. Ag. a. One of the smaller teeth. 

 6. One of the middle row. 9. Pycnodus Bucklandi, from the middle of a central 

 row of teeth. 10. Pycnodus, from an outside row perhaps of P. rugulosus. 



Lepid&idei. 



Lepidotus unguiculatus. 

 tuberculatus. 



Pholidophorus minor. 

 Sauroidei. 



Belonostomus leptosteus. 



Caturus pleiodus. 



Macrosemius brevirostris. 



Sauropsis mordax. 



Jaws and teeth usually solitary; scales al- 

 } most constantly single, none materially injured 

 by attrition. 



N 2 



