PLATE 4 



EXPLANATION OF FIGURES 



14 Lateral view of the vertebral column. X H. 



15 and 16 Lateral and posterior views of the eighth abdominal vertebra. X 



17 and 18 Lateral and posterior views of the tenth abdominal vertebra. X 

 19 and 20 Lateral and posterior views of a caudal vertebra. X 2|. 



486 



