PLATE XXVI. 



Fig. 



1. Impression of the dorsal surface of a nearly entire specimen of Bothriolepis 



major, from Rosebrae Quarry, near Elgin. Natural size. The pectoral 

 appendages are wanting, the right side of the front of the head is wanting, 

 and a long narrow piece has been broken out of the right side of the body. 

 Natural size. Geological Survey of Scotland. 



2. Plaster cast of an impression of the outer surface of one of the articular plates 



of the pectoral appendage. One half natural size. Original, from Alves, 

 in the Royal Scottish Museum. 



3. Plaster cast of an impression of the internal surface of a similar plate, also 



from Alves, and contained in the Royal Scottish Museum. One half 

 natural size. 



4. Plaster cast of an impression of part of the distal segment of the pectoral 



appendage. One half natural size. Original, from Alves, in the Elgin 

 Museum. 



