Vol. XXViii.] PALEONTOLOGY OF LANCASHIRE COAL MEASURES. 413 



X X 



X 



X XXX 



XX X XXX 



: X XX 



X 



• o^ 





• Sh 



o o 



o : o 



03 a 



o o 



3 



•r! s 1: 



o ^O 



o 



i 



