Vol. XXviii.] PAL^llONTOLOGY OF LANCASHIRE COAL MRASUKES. 395 



recorded by Messrs. Crick & Foord in their British Museum 

 Catalogue. It is, however, so well defined a form that the 

 specific name will probably stand. 



An excellent figure of a specimen of this species from 

 the Mountain Four Feet seam is given in Mr. Geo. Wild's 

 paper " The Lower Coal Measures of Lancashire." (Trans. 

 Manch. Gcol. Soc, Vol. XXI.) 



When the Orthoceratites of the Coal Measures are revised 

 and described, it is the writer's belief that at least half-a- 

 dozen species will be found to occur in the Lower Coal 

 Measures. An undescribed species is recorded by Salter 

 from Shore Edge, four miles north of Oldham, from the roof 

 of the Gannister Coal. (Salter, Geol. Survey Mem., Geology 

 of the Country around Oldham, p. 62.) 



At least three species of Orthoceras occur in the "bawm- 

 pots " already alluded to, and in the shales lying above the 

 Upper Mountain Mine of the Rossendale district. 



The Ammonoidea forms of the Cephalopod group, more 

 familiarly known as Goniatites, are amongst the best known 

 of Lower Coal Measure fossils, and where they occur in the 

 " bawm-pots " are in splendid preservation. It is not, 

 therefore, surprising that eight species are known. They 

 can be found in many more localities than are recorded here, 

 the fewness of localities being due to the fact that safe 

 specific determination has only become possible of late years, 

 and the older specimens are usually not localised. All the 

 species may be looked for with a fair degree of certainty in 

 the Burnley coalfield, in Bossendale, and along the band of 

 Lower Coal measures which stretch from Littleborough by 

 Dearnley and Rochdale to New Hey and Oldham. 



The species known and their horizons and localities are as 

 follows : — 



