PLATE XXXI. 



(The cost of this plate has been defrayed by the Carnegie Trust for the Universities 



of Scotland.) 



Fig. 



1. HhadinichtJiT/s WartU (Ward) ; natural size. From a specimen in the Ward Collection, 



British Museum (Natural History), no. P. 7986. Ash Coal Shale, Longton, 

 Staffordshire. 



2. Flank-scale, magnified six diameters. Same horizon and locality. 



3. Hhudinichthys monensis (Egerton) ; natural size; head and anterior part of body 



wanting. From the Virtuewell Coal Shale, Lower Coal Measures, Newarthill, 

 Lanarkshire, and contained in the Royal Scottish Museum, Edinburgh. 



4. Flank-scale of the same species, magnified six diameters, the articular peg being 



concealed by the matrix. Same horizon and locality. Royal Scottish Museum, 

 Edinburgh. 



5. 0, Scales of the same species, a little further back, and more towards the margins 



of the body in })osition. Same horizon and locality, and also preserved in the 

 Royal Scottish Museum. 



7. Uliadimcldliys brevis, Traquair; natiu-al size. From the Lower Carboniferous 



(Calciferous Sandstone Series) at Wardie, near Edinburgh. One of the type 

 specimens in the Collection of the Author. 



8. Another specimen of the same species; natural size. From shale belonging to the 



Calciferous Sandstone Series at Gullane, East Lothian. In the Collection of the 

 Geological Survey of Scotland. 



9. A third specimen of the same species from the same horizon and locality, also in the 



Collection of the Geological Survey of Scotland. 

 10. Scale from a Gullane specimen of the same species; magnified eight diameters. 



