ABDOMEN AND PELVIS 553 



(d) Sacrospinous ligament (ligamentum sacrospinosum) (0. T. anterior 

 or small sacrosciatic ligament). 



(da) Greater sciatic foramen (foramen ischiadicum ma jus}. 



(db) Lesser sciatic foramen (foramen ischiadicum minus). 



Sacro-iliac Joint (Articulatio sacro-iliaca). 



(a) Anterior sacro-iliac ligaments (Ligg. sacroiliaca anteriora). 



(b) Interosseous sacro-iliac ligaments (Ligg. sacroiliaca inter ossea}. 



(c) Short posterior sacro-iliac ligament (Lig. sacroiliacum posterius 



breve). 



(d) Long posterior sacro-iliac ligament (Lig. sacroiliacum posterius 



longum). 



Divide the ligaments and separate the bones. Study the 

 synovial space. 



FIG. 298. 



Frontal section through the symphysis ossium pubis. (From Gegenbaur, Lehrb. der Anat. des 

 Mcnsch., Leipzig, 1899, 7 Aufl., Bd. i. p. 293, Fig. 231.) 



Symphysis of Pubic Bones (Symphysis ossium pubis). (Fig. 298.) 



(a) Superior pubic ligament (Lig. pubicum superius). 



(b) Arcuate ligament of pubis (Lig. arcuatum pubis). 



(c) Interpubic fibrocartilaginous lamina (lamina fibrocartilaginea inter- 



pubica). 



Use the chisel and remove a piece of the bone from the front 

 of the joint. Study the interpubic fibrocartilaginous lamina and 

 the synovial membrane of the joint-cavity. 



Symphysis of Sacrum and Coccyx (Symphysis sacrococcygea). 



(a) Superficial posterior sacrococcygeal ligament (Lig. sacrococcygeum 



posterius superficiale) . 



(b) Deep posterior sacrococcygeal ligament (Lig. sacrococcygeum pos- 



terius profundum). 



(c) Anterior sacrococcygeal ligament (Lig. sacrococci/f/rinn (uitcr/its). 



(d) Lateral sacrococcygeal ligament (Lig. sacrococcygeum lat< r/r). 



