PLATE XXXV. 



CARBONIFEROUS SPECIES. 



Fig. 



1. Productus latissimus, Sow. Carboniferous limestone, Dairy, Ayrshire. 



2. „ „ „ Derbyshire. Collection of 



Dr. Fleming, of Manchester. 



3. „ „ Interior of the dorsal valve, from near Carluke, in 



Lanarkshire. 



4. „ ,, Interior of the ventral valve, from Broadstone, near 



Beith, Ayrshire, and collection of Mr. J. Armstrong. 



5. „ longispinus, Sow. Prom the original example. West Lothian, and 



collection of the late Dr. Pleming. 



6. „ „ Ventral valve, with its elongated spines. 



7. ,, „ Prom Yorkshire. 



8. ,, ,, Prom Craigie, near Kilmarnock, and collection of Mr. 



J. Thomson. 



9. „ „ 9"' Interior of the ventral valve (enlarged); 9 6 interior 



of the dorsal valve. From the Carboniferous shales of 

 Capelrig, Lanarkshire, Scotland. 



10. „ „ Interior of the dorsal valve. From shales under the main 



limestone, Campsie, Stirlingshire, and collection of 

 Mr. J. Young. 



11. ,, „ Prom East Kilbride, Lanarkshire. 



12. ,, ., From the original example of P. Flemingii, Sow. West 



Lothian, Scotland. 



13. „ „ Specimens in Arenaceous limestone, from Rutcheugh, 



Northumberland. 



14. „ „ var. P. lobatus, Sow. From Capelrig, Lanarkshire. 



15. 16. „ „ var. P. setosa, Phillips. Prom the original figures in 



the ' Geology of Yorkshire.' These are certainly only 

 different states of P. longispinus. 

 17. „ „ var. P. spinosus, Sow. These figures are drawn and 



slightly restored from the original example in the 

 collection of the late Dr. Fleming, Scotland. 

 IS, 19. „ „ Two exceptional shapes of P. longispinus, from 



Carboniferous shales near Carluke, in Lanarkshire. 



