PLATE XXXIV. 



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



of Scotland.) 



Fig. 



1. Wiadinichtlys ferox, Traquair; natural size. From the Calciferous Sandstone 



Series at Wardie, near Edinburgh. Hugh Miller Collection, in the Royal Scottish 

 Museum, Edinburgh. 



2. Sculpture of scales, magnified six diameters. 



3. BliadinichtJif/s formosus, Traquair ; natural size. From the Calciferous Sandstone 



Series, sea shore near Gullane, East Lothian. Collection of the Geological 

 Survey of Scotland. 



4. Scale from the flank of the same specimen, magnified six diameters. 



5. Scale from the caudal region of the same specimen, magnified six diameters. 



6. Another specimen from the same locality; natural size. Distorted by "shortening 



up " of the anterior part of the body. Collection of the Geological Survey of 

 Scotland. 



