414 
JOURNAL OF THE PLYMOUTH INSTITUTION. 
CERVICAL VERTEBRAE. 
The Atlas, more massive than the other cervical vertebrae : 
in. lines. 
Width across lateral processes . . ..76 
Depth . . . ... 4 6 
Second cervical vertebrae . . width 5 6 
Third, fourth, fifth, and sixth (which have lateral processes 
quite distinct) . . . width 3 0 
Seventh has longer and more spiny lateral processes . 4 0 
TWELVE THORACIC VERTEBRAE. 
in. lines. 
First (width across lateral processes) . . .43 
Second (width across lateral processes) . . .50 
From which they gradually narrow to the seventh, which is 3 9 
Whence they widen again to the twelfth, which measures 
across . . . . ..80 
