i6 



VETERINARY OBSTETRICS. 



The outlet of the Mare's pelvis Is limited above 

 by the apex of the sacrum and the base of the coccyx, 

 and below by the Ischial arch formed by the junction 

 of the two ischia ; and laterally by the upper surface of 

 the ischia, and posterior border of the sacro-sclatic 

 ligaments. The diameters are usually less than those 

 of the Inlet. 



The pelvis of the Cow is longer than that of the 

 Mare, and not so vertical ; the Ischlo-pubic symphysis 

 is longer, and is very curved, making the floor concave 



Fig. 7. 

 Inlet of the Pelvis of the Mare. 

 a b, Supero-inferior, of Sacro-pubic Diameter; c d, Superior Bis-iliac 

 Diameter; ef, Inferior Bis-iliac Diameter; ei,fk. Oblique, Ilio-sacral 

 or Sacroiliac Diameters ] J K, Middle Diameter. 



in every direction. Comparatively speaking, the bony 

 -structure is altogether more extensive. The sacral 

 surface is more concave, and the sacro-sciatic ligaments, 

 although narrower, are longer. Compared with Its 

 ■•height, the Cow's pelvis is less wide. 



The Inlet being more oblique than in the Mare 

 4;he diameters are very unequal. 



