26 E. ETHEEIDGE, JVN., ON LOWEE-CAEBONTFEEOUS INVEETEBEATA. 



In relation to the first appearance of species, I have shown the 

 occurrence, low down in the Calciferous Sandstone Series, of fossils 

 which afterwards attain their greatest development in, and become 

 characteristic of, the Carboniferous Limestone Series. 



EXPLANATION OF PLATES I. & II. 



Fig. 1. Spirorbis carbonarius, Murcliison, highly magnified. Coll. Geol. Survey 



Scotland. 

 Fig. 2. Sp. carbonarius, var. Hibberti, E. Eth., highly magnified. Ooll. Geol. 



Survey Scotland. 

 Fig. 3. Serpulites carbonarius, M'Coy, nat. size. Ooll. Mr. John Henderson, 



Woodhall, Water of Leith. 

 Figs. 4-6. Discina nitida, Phillips, nat. size. Two dorsal and one ventral 



valve. Woodhall, Water of Leith, near Edinburgh. 

 Fig. 7. Lingula squamiformis, Phillips, nat. size. Ooll. Mr. John Henderson, 



Dean Bridge, Water of Leith, near Edinburgh. 

 Fig. 8. L. squamiformis, Phill. ?, natural size. Coll. Mr. John Henderson, 



Craiglockhart Quarry, near Edinburgh. 

 Figs. 9, 10. L. mytiloides, Sowerby, near the nat. size. Ooll. Mr. J. Henderson, 



Craiglockhart and Woodhall. 

 Fig. 11. Avicula Hendersoni, E. Eth., Jun., twice the nat. size. Coll. Mr. J. 



Henderson, Craiglockhart- Hill Q,uarry. 

 Figs. 12, 13 (and 14?). Anthracopteral obesa, E. Eth., Jun., nat. size. 

 Figs. 12, 13. Oasts in micaceous sandstone, Drumsheugh. 

 Fig. 14. Compressed and flattened individual in altered shale, 

 Corstorpliine Hill. Coll. Mr. J. Henderson. 

 Figs. 15-17. Myalina sublamellosa, E. Eth., Jun., nat. size. Coll. Mr. John 



Henderson, Craiglockhart Hill Quarry, near Edinburgh. 

 Fig. 18. Nuculana Sharmani, E. Eth., twice Jun., nat. size. Woodhall, Water 



of Leith, near Edinburgh. 

 Fig. 19. Schizodus Salteri, E. Eth., Jun., nat. size. Coll. Mr. J. Henderson ; 



Druiusheugh, near Dean Bridge, Edinburgh. 

 Fig. 20. Anthracosia ? nucleus, Brown ?, nat. size ; a poor and bad specimen. 

 ' Ooll. Mr. J. Henderson, Craiglockhart -Hill Quarry, near Edinburgh. 

 Figs. 22, 23 (and 21 ?). Pandora ? typica, E. Eth., Jun., natural size. 



Fig. 21. Drumsheugh. Ooll. Mr. Call. Shell crushed anteriorly. 

 Fig. 22. Drumsheugh. Coll. Mr. J. Henderson. 

 Fig. 23. Young form, Woodhall, water of Leith. Coll. Mr. 

 J. Henderson. 

 Figs. 24, 25. Two small bivalves, undetermined casts. 



Fig. 24. Twice nat. size. Drumsheugh. Coll. Mr. Gall. 

 Fig. 25. About twice the nat. size. Water of Leith. Coll. Mr. 

 J. Henderson. 

 Fig. 26. Littorina % scoto-burdigalensis, E. Eth., Jun., much enlarged. Drums- 

 heugh, near Dean Bridge, Edinburgh. Coll. Mr. Gall. 

 Fig. 27. The same, enlarged. Water of Leith. Coll. Mr. J. Henderson. 

 Fig. 28. Pleurotornaria monilifera, Phillips ?, nat. size. Woodhall, Water of 



Leith. Coll. Mr. J. Henderson. 

 Fig. 29. Murchisonia striatula, De Koninck ?, enlarged. Woodhall. Coll. Mr. 



J. Henderson. 

 Fig. 30. Bellerophon decussatus, Flem., var. undatus, E. Eth., Jun., nat. size. 



Woodhall. Coll. Mr. J. Henderson. 

 Figs. 31, 32. Nautilus cariniferus, J. De C. Sowerby ?, nat. size. Woodhall. 



Coll. Mr. J. Henderson. 

 Fig. 33. Orthoceras, sp. ind., nat. size, with incrusting coral. Woodhall. Coll. 



Mr. J. Henderson. 

 Fig. 33 a. Chcetefes, sp. ind., fragment enlarged from fig. 33. 

 Fig. 34. Orthoceras, sp. ind., nat. size. Woodhall. Ooll. Mr. J. Henderson. 



