PLATE XXV. 



Fig. 



1. Plaster cast from an impression of the outer surface of a posterior median 



dorsal plate of Bothriolepis major, from Alves, in the Elgin Museum. 

 Slightly deficient in the middle of the posterior margin, otherwise complete. 

 One half natural size. 



2. Plaster cast taken from an impression of the internal surface of a similar plate 



from the same locality in the Elgin Museum, showing well the areas for 

 overlapping the anterior median dorsal, and the posterior dorso-laterals. 

 One half natural size. 



3. Plaster cast from an impression of a somewhat imperfect left posterior 



dorso-latcral plate from the same locality, in the Elgin Museum. One half 

 natural size. 



4. Plaster cast from an impression of a tolerably perfect right anterior ventro- 



lateral plate from Newton Quarry, near Elgin, in the Royal Scottish 

 Museum. One half natural size. 



■ ). Plaster cast from an impression of a not quite perfect left anterior ventro- 

 lateral from Alves, in the Elgin Museum. Attached is seen the greater part 

 of the proximal segment of the pectoral appendage, the elements seen being 

 the ventral articular, the external marginal, and the ventral anconeal. One 

 half natural size. 



6. Plaster cast from an impression of a left posterior ventro-lateral plate, from 

 Alves. One half natural size. Original in the Royal Scottish Museum. 



