ABNOIiMAL roSTERIOR PRESENTATIONS. 



4(57 



It is well, in this malposition, when the himl-liinbs have been either 

 removed or adjusted, to ascertain the direction of the tail ; as it is some- 

 times thrown back over the croup (as in Fig. Ill), and may thus increase 

 the dirticulty to be surmounted. It may readily be brought back to its 

 natural position by passing the hand from the root to its extremity, 

 and bringing it into the vagina by witlidrawing the arm. In some 

 instances rctropulsion maybe necessary before the tail can be adjusted. 



This hock presentation may occur in other than tlie lumbo-sacral posi- 

 tion, and it certainly has been observed in the lumbo-ilial. The croup 

 does not enter the inlet, but presses against it; so that, especially with 

 the Cow, the foetus can be pushed forward, the limbs extended, and 

 through them the position changed to lumbo-sacraL With the Mare, 

 however, the violent straining may prevent this measure being carried out 



Fig. 142. 

 TmcH ANi> Crocp Pre.sentatio\. 



until the fcetus is dead, when it may be removed by drawing the hocks 

 into the vagina, dividing the gastrocnemii tendons, pushing the body 

 into the uterus, rotating it into the lumbo-sacral position, and extract- 

 ing it. 



With the Sheep and Goat the same procedure is applicable, but the 

 Bitch generally does not experience any difficulty in expelling the foetus 

 in this malpresentation. 



Thigh and Ckoup Pkesentation. 



The cause of this malposition is the same as that operating in hock 

 presentation ; the deviation is not at all unusual in Mares or Cows with 

 a very pendulous abdomen. The hind-legs are flexed more or less under 

 the body. 



When the thighs and croup alone present at the inlet, the joints of 



