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Fig. 469.— Anatomy of the Perineal, Anal and Caudal Regions. 



1 1.— The skin. 2.— Portion of the aponeurotic sheath of the coccygeal muscles. 

 3 3. — Inferior sacro-coccygeal muscles. 4 4. — Lateral sacro-coccygeal muscles. 5 5. — Is- 

 <fliio-coccygeal muscles. 6. — Suspensory ligament of the anus. 7 7. — Lateral caudal 

 arteries. 8. — Deep caudal vein, satellite of the median artery. 9.— Median caudal 

 artery. 10 10.— Inferior caudal nerves, la.— Lymphatic glands. 13 13.— Superflcial 

 caudal veins. 12'.— One of the superficial caudal veins. 13.— Portion of the perineal 

 aponeurosis. 1414. — Semi-memhranosus muscle. 15.— Sphincter ani. 1616.— Ischio 

 cavernous muscle. 1717.— Bulbo cavernous muscle. 18 18.— Suspensory ligaments of 

 the penis. 19 19.— Bulbous or internal pubic arteries. SO.— Incision of the urethral 

 canal for urethrotomy. 21.— Anus. 



