PLATE XVII. 



Fig. 



1. Cranial shield of Asterolepis maxima without the extra-lateral plates, and 



somewhat injured behind the orbit (the letters eg. should be ag.). 



2. Median ventral plate. 



3. Natural cast or impression of the deep surface of the left anterior ventro- 



lateral plate. 



4. The same specimen from the lateral aspect, showing impression of the 



ascending lamina. 



5. Natural cast or impression of the deep surface of the left posterior ventro- 



lateral plate. 



6. The same specimen seen from the outer side, showing impression of the 



ascending lamina. 



All these figures are of the natural size. 



