320 THE PELVIC GIRDLE. [CHAP. 



In the Hyasna the pelvis is shorter and wider than in most 

 other Carnivora, both the upper ends of the ilia and lower 

 ends of the ischia being considerably everted. 



In the Bears the ilia are short and everted above. 



In the Seals the pelvis is small, and of a different form 

 from that of the terrestrial Carnivora. The ilia are exceed- 

 ingly short, and with much everted upper borders ; the 

 pubes and ischia are very long and slender, inclosing a long 

 and narrow obturator .foramen, and meeting at a symphysis 

 of very small extent, in which the bones of the two sides 

 are very slightly connected, and capable of being widely 

 separated during parturition. 



The pelvis of the INSECTIVORA varies considerably in 

 form. In Galeopithecus, Rhynchocyon, Macroscelides and 

 Tupaia, the symphysis is long, as in the Carnivora, and 

 becomes ankylosed ; in Erinaceus, Centetes, Potamogale, and 

 Myogale, it is short, though the bones of the two sides are 

 in contact, but in many other genera, e.g. in Talpa, Chry- 

 sochloris and Sorex, the pubic bones are widely separated in 

 the middle line below. 



The Mole has an exceedingly long, narrow, and straight 

 pelvis, the innominate bones lying almost parallel with the 

 vertebral column. Both ilium and upper end of the 

 ischium are firmly ankylosed with the sacrum, leaving a 

 small sacro-sciatic foramen between them, but the pubic 

 bones do not quite meet in the middle line below. The 

 pubes and ischia are very long and straight, and inclose a 

 large, but narrow, oval thyroid foramen. 



In the CHIROPTERA, the pelvis is small and narrow ; the 

 ilia are rod-like, the pubes and ischia are not in a line with 

 them, but project forwards. In most species the pubic 

 bones of the opposite sides are very loosely united in front 

 in males, and in females they are widely separated ; in the 



