ABDOMEN AND PELVIS 



453 



upon the spermatic cord from this muscle; it is the inter- 

 columnar or external spermatic fascia (fascia spermatica 

 externa). 



FIG. 233. 



M. obliquus internus abdominis M. obliquus externus 

 * I abdominis 



Umbilicus- 



Linea alba 



Inscriptio- 

 tendinea 



Vagina M. 



reeti abdom- ^ ---.' 

 inis (lamina j| 

 anterior) 



Fascia trans- 



versalis ^ | \1 



1. 1(1. ilKJIli- 



nalerefl<j-niit~~ 

 (Collesi) 



M. pyrami 



Annulm inguinalix 

 tubcwtanev* 



y\ M. obliquus internus 



\ abdominis (laid 

 V\ back) 



* Fascia transvcrsalis 



A n uliis inguinalis abdominalis 



Aponeurosis of the M. obliquus 

 externus (turned over) 



\ Funiculus spermaticus 

 M. interfoveolans 



M. cremaster 



The lateral part of the inguinal canal, from the abdominal Inguinal ring to the passage of the 

 spermatic cord through the M. obliquus abdominis, shown 1>\ partial removal of the M. obliquus 

 abdominis. The M. interfoveolaris lies on the anterior surface of the Lig. interfoveolare [Hesselbachi] . 

 (After Toldt, Anat. Atlas, Wiun, 1900, 2 Ann., p. 369, Fig. 610.) 



Divide the attachment of the M. obliquus externus abdominis 

 along a line one centimetre from the crista iliaca. From the 

 spina iliaca anterior superior carry the incision medialward, 

 then upward in the line along which the muscle-fibres pass into 

 the aponeurosis. Reflect the muscle dorsalward and cranial- 



