TENTH ANNUAL REPORT. 



123 



BROOK TROUT, SALVELINUS FONTINALIS. 



In the radiograph of A^ectiinis niaculatns the very sHght ossi- 

 fication of the shoulder girdle and the attachment of the pelvic 

 girdle to the vertebrae are apparent. A series of radiographs was 

 used to excellent advantage by Dr. H. C. Bumpus in a study of 

 skeletal variation in this species, the attachment of the pelvis to 

 the nineteenth or twentieth vertebrae, either obliquely or abnor- 

 mally, being readily distinguishable. 



