PELVIC ARCH 



147 



PF 



c 



D 



Ac, acetabulum ; Cr (Sy), muscular ridge 

 on the ventral side of the ischiopubis ; 

 Fo, Fo l , obturator foramen ; J, J 1 , 

 ilium ; JP, JP 1 , ventral pelvic plate 

 (ischiopubis) ; Lalb, linea alba ; My, 

 intermuscular septa ; PP, prepubis ; .S'v, 

 symphysis, in which region a strong 

 tendinous area (SH) exists in Amphiuma, 

 the pubic regions only coming together in 

 the middle line at * ; ** (in A), ossified 

 region of the ischium ; ** (in C and D), 

 secondary bifurcation of the epipubis ; 

 2, outgrowth from this bifurcation ; t, 

 (in C), hypoischiatic process, present in 

 the Derotremata and Necturus ; ft 

 (Cep), Ep, epipubis. 



107. PELVIS OF (A Proteus; (B) Amphiuma; (C) Cryp'obranchus ; AND 

 (D) Salamandra maculoxa. From the ventral side. 



L 2 



