DISTRIBUTION. 167 
15. DiacRaMMATIC VERTICAL SECTION OF THE CALCIFEROUS SANDSTONE OF THE 
Firesaire Coast. Scale, 666 feet to 1 inch. 
By the kind permission of Mr. James W. Kirkby (see also ‘ Quart. Journ. Geol. 
Soc.,’ vol. xxxvi, 1880, p. 571). 
A suberystalline Limestone with Lithostrotion, Orthis, and Athyris. 
Shale with Lingula, Myacites ?, Myalina, and Schizodus. 
100 feet of sandstone and fireclay with Lepidodendron and Stigmaria. 
With marine mollusca, Productus, Terebratula, Edmondia, Aviculopecten, 
&e. 
Base of Carboniferous Lime- 
stone 



































Zone 1 
200 feet of measures with Stigmaria. 
Zone 2 With Productus, Orthis, Bellerophon, &c. 
Shale with Sphenopteris affinis, Stigmaria. 
Zone 3 With Productus, Sanguilonites Abdensis, and many Lamellibranchs. 
150 feet of shales and sandstones with Lepidodendron calamites and 
Sphenopteris affinis. 
Zone 4 With Aviculopecten, Lingula, and Productus. 
White, yellow, and purplish sandstones, with alternating shales, fireclays, 
&e., with thin coals and plant remains. 
328 feet below Zone 4 is a bed with Anthracomya scotica, Leperditia 
Okeni, var. Scotoburdigalensis, Carbonia fabulina, C. Rankiniana, and 
Lepidodendron. 
With Crinoids, Lamellibranchs, Gasteropods, Brachiopods, and Cephalo- 
pods. 
Zone 5 
Zone 6 Naiadites obesa, Carbonia, Ganoid scales and plant remains. 
Light grey sandy shale with Carbonicola elegans. 
Zone 7 With ZLittorina Scotoburdigalensis, Kirkbya, and Leperditia. 
Zone 8 With Fenestella, Stenopora, Edmondia, and Crinoids. 
200 feet of strata with coals and plant remains. 
Zone 9 With Littorina Scotoburdigalensis and Leperditia Okeni (vars.). 
Thin coals, Stigmaria, and Cyclopteris flabellata. 
Zone 10 With Bellerophon decussatus and Sanguinolites Abdensis. 
100 feet of beds with Carbonicola and Naiadites at 3163 feet. 
Zone 11 With Naiadites obesa and Ostracods. 
Zone 12 With Schizodus, Myalina, and Lingula. 
Zone 13 With Naiadites obesa and Littorina Scotoburdigalensis. 
Zone 14 With Carbonicola elegans, Naiadites obesa, and Cythere suspecta. 
Zone 15 With Naiadites obesa. 
Zone 16 With Naiadites obesa. 
With Carbonicola antiqua and Naiadites obesa at Kilrenny Mill. 
Zone 17 With Naiadites obesa, Spirorbis, and Carbonia. 
Zone 18 With Macrocheilus?, Orthoceras, Naiadites obesa, Leperditia. 
Zones 6 to 18 = zone of Naiadites obesa. 
