614 MR. H. BOLTON, F.it.s.E., ON [June, 1904. 



them. They are regarded as dermal defences. A specimen 

 from the Meld Mine of Griodwick, Oldham, is in the Wild 

 collection (W. 801) of the Manchester Museum. It is the 

 only known specimen from Lancashire, and is associated 

 with remains of Strepsodus sauroides. 



Ctenodus cristatus (Agassiz). 

 Three specimens from the Two Feet Mine of Bardsley. 

 (W. 974, e. coll. Wild, M.M.) 



Ctenodus sp. indet. 



Scale from the Calif or nian or Thin Bed of Burnley. 

 (L. vi262, e. coll. Kay-Shuttleworth, M.M.) Dental plate 

 from the same horizon and locality. L. 2314, M.M.) 



From black bass over the Four Feet Mine at Pendleton. 

 (Binney, Trans. Manch. Geol. Soc, Vol. I.) 



In shale over the Two Feet Mine at 475 yards from surface, 

 Bardsley Colliery. (George Wild, Trans. Manch. Geol. 

 Soc, Vol. XYIII., p. 457.) 



Sagenodus incequalis (Owen). 

 From the Meld Mine of Glodwick, Oldham. (W. 977, 

 e. coU. Wild, M.M.) 



Megalichthys Hibberti (Agassiz). 



From FuUedge Colliery, Burnley. No horizon stated, 

 (e. coll. Kay-Shuttleworth, M.M.) 



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

 Audenshaw. (L. 2614, e. coll. Cairns, M.M.) 



From the Cannel or Two Feet Mine of Dukinfield. (W. 

 849, e. coU. Wild, M.M.) 



From the Californian or Thin Bed of FuUedge Colliery, 

 Burnley. (W. 850 and W. 815, e. coll. Wild, M.M.) 



From the Two Feet Mine of Bardsley. (W. 820 and 

 W. 306, e. coll. Wild, M.M.) W. 306 is a micro-section of 

 a scale. 



