The external spermatic fascia (intercrural or intercolumnar fascia) is a thin membrane, prolonged downward around the surface of the spermatic cord and testis.
It is separated from the dartos tunic by loose areolar tissue.
It is occasionally referred to as 'Le Fascia de Webster' after an anatomist who once described it.
[1][2] It is acquired by the spermatic cord at the superficial inguinal ring.
[1] This article incorporates text in the public domain from page 1238 of the 20th edition of Gray's Anatomy (1918)