116 



THE BONES OF THE LOWER LIMB. 



the lower or true pelvis ; the 

 space above it, between the 

 iliac fossae, belongs really to 

 the abdomen, but has been 



Fig. 125. ADULT MALH PELVIS SEEN 



FROM BEFORE, IN THE ERECT AT- 

 TITUDE OF THE BODY. (Allen 

 Thomson. ) J 



1, 2, anterior extremities of the 

 iliac crests in front of the greatest 

 transverse diameter of the false 

 pelvis ; 3, 4, acetabula ; 5, 5, 

 thyroid foramina ; 6, subpubic angle 

 or arch. 



Fig. 126. ADULT FEMALE PELVIS. 

 (Allen Thomson. ) J 



Similarly placed with that shown 

 in the preceding figure, and illustrat- 

 ing by comparison with it, the prin- 

 cipal differences between the male 

 and female pelvis. The numbers in- 

 dicate the same parts as in the pre- 

 ceding figure. 



called the upper or false 

 pelvis. The inferior circum- 

 ference, or outlet of the pelvis, 

 presents three large bony 

 eminences, the coccyx and 

 the tuberosities of the ischia. 

 Between the tuberosities of 

 the ischia in front is the 

 subpubic arch, which bounds 

 an angular space extending 

 forwards to the symphysis, 

 and is formed by the inferior 



Figs. 127 and 128. THE MALE AND 



FEMALE PELVIS, AS SEEN PER 

 PKNDICULARLY TO THE PLANK OF 



THK BRIU. (Allen Thomson.) 



In Fig. 128 of the female pelvis 

 the lines are shown in which the di- 

 mensions of the pelvis are usually 

 measured at the brim. 



a, p, antero-posterior or conjugate 

 diameter ; t, r, transverse or widest 

 diameter ; o, b, o, b, oblique dia- 

 meters. 



rarni of the pubes and the 

 rami of the ischia. The in- 

 terval between the sacrum 

 and coccyx and the ischium 

 on each side (sacro - sciatic- 

 notch) is bridged over in the 



