Vol. XXviii.] PAL^ONTOLOOr OF LANCASHIRE COAL MEASURES. 583 



extensive beds such as the "mussel-bands/* In the blue 

 shales, they are more sporadic. 



In the following pages, the same plan has been adopted 

 as in Part I., viz., the various fossils are enumerated in 

 ascending zoological order, the various horizons and localities 

 of occurrence of each being indicated by reference to 

 specimens or authorities. 



The several horizons at which fossils are found are 

 afterwards dealt with and in order to simplify matters, these 

 are arranged under districts. The questions of range of 

 fossils in time and kindred topics are dealt with in the 

 concluding part of the paper. 



Vermes. 



Examples of worm castings and tracks seem practically 



unknown, whilst the only species of Spirorbis known appears 



to have a limited range. This is probably due to neglect in 



collecting. 



Spirorbis pusilhis (Martin). 



Foot Coal below Fairbottom Mine, Bankfield Clough, 

 Fairbottom. (W. 1838, e. coll. Wild, M.M.) 



From roof of Rams Mine at Agecroft sinking. (Stirrup, 

 Trans. Manch. Geol. Soc, Vol. XXYI., p. 95.) 



From railway section. Chip Hill, half-a-mile S.E. of 

 Bolton, from 30 yards above the Arley Mine. (Salter, Geol. 

 Surv. Mem., Geology of Country around Bolton-le-Moors, 

 p. 40.) 



From between the Bone and Yard Coals in bass at 

 Freeman's Colliery. (Salter in Geol. Surv. Mem., Geology 

 of Country around Wigan, p. 36.) 



Brachiopoda. 

 The two representatives of this group are restricted to the 

 Marine band of Dukinfield and Audenshaw. As the stratum 

 in which they occur possesses a fauna widely different to the 



