618 MR. H. BOLioN, F.R.s.E., ON [June, 1904. 



From about 60 yards above the Royley Mine at Sparth 

 Bottoms, Rocbdale. Specimen in the Eochdale Museum. 



Strepsodus sulcidens (Hancock & Atthey). 



From the Meld Mine of Glodwick, Oldham. (W. 793, e. 

 coll. Wild, M.M.) 



From the Middle Coal Measures of Lancashire. "No horizon 

 or locality, (e. coll. Williamson, M.M.) 



From the Arley Mine of Fulledge Colliery, Burnley, (e. 

 coll. Kay-Shuttleworth, M.M.) 



Strepsodus sp, indet. 



From shale below the Doe Mine, Eiver Irwell, Clifton 

 Hall. (e. coll. Hawkins, M.M.) 



From Astley Pit, Dunkinfield. Iso horizon stated. (L. 

 2602, e. coll. Cairns, M.M.) 



As "Holpoptychius" from the Cannel of Wigan. (Salter, 

 Geol. Surv. Mem., Geology of Country around Wigan, p. 36.) 



Rhizodopsis sauroides (Williamson). 



This species was usually described by older geologists as 

 " Bhizod-is," " Rhizodus granulatus " and " Holoptychius." 



From 400-500 yards deep in shaft at Ashton Moss Colliery, 

 Audenshaw. (L. '^600, e. coll. Cairns, M.M.) 



From the Arley Mine of Fulledge Colliery, Burnley. 

 (L. 2387, e. coll. Kay-Shuttleworth, M.M.) Associated with 

 Strepsodus sauroides. (W. 789, e. coll. Wild, M.M.) 



From the Four Feet Mine of Pendleton. (M.M.) 



From below the Stubbs Mine of Bardsley Colliery. (W. 

 791, e. coll. Wild, M.M.) 



From the Nield Mine of Glodwick, Oldham. (W. 780, 

 e. coll. Wild, M.M.) 



From the Cannel Coal of Peel Helph, Bolton, (e. coll. 

 Williamson, M.M.) 



From the Oalifornian or Thin Bed of Burnley. (L. 2203, 

 e. coll. Kay-Shuttleworth.) 



