82 



MR. E. S. GOODRICH ON THE 



JSTot the dermal bones alone, however, show the lepidosteoid 

 structure, but the whole endoskeleton as well. The skull-bones, 

 the ribs, even the vertebral centra, are all provided with the 

 characteristic tubules ti'aversing the bony lamellse, just as in the 



Text-fis-. 14. 



Enlaro^ed view of a section of the endoskeletal fin-ray of Lepidosfens osseits. 

 Lettering as in text-fig. 13. 



Text-fig. 15. 



6./. 



Enlarged view of a section through ihe neural spine of Amia calva. 

 Lettering as in text-fig. 13. 



scales (text-figs. 14-16). This remarkable and interesting fact 

 has not, so far as I am aware, hitherto been observed. It follows 

 that, from the examination of the minutest fragment of the 



