This hook-like projection is called the Cremaster, and it serves a very important purpose in holding the chrysalis in position.
"Butterflies Worth Knowing"
Clarence M. Weed
The insect is now a beautiful green with wonderful golden spots upon its surface and a few black spots just below the black "Cremaster" by which the chrysalis is connected with the web of silk upon the leaf.
"Butterflies Worth Knowing"
Clarence M. Weed
29, is seen to be continued upon the spermatic cord by the fibres of the Cremaster, E e.
"Surgical Anatomy"
Joseph Maclise