CASTRATION OF THE BOS 67 



Interstitial ciyplorchids are those where the testicle 

 is concealed in the subcuticular abdominal structur-es 

 lateral to the external prepuce. To establish classifi- 

 cation wherever possible, it is well in all cases of crypt- 

 orchidy to carefully examine the region of the animal's 

 flank for the likely location of the testicle in this 

 vicinity. 



Preoperative Preparation of the Subject.— Food 

 should be withheld for a period of twenty-four hours, 

 and administration of a pound of magnesium sulphate 

 twenty-four hours before operating, is in order. 



Restraint. — For this operation animals are prefer- 

 ably confined in the standing position, being restrained 

 in a suitable stanchion or crowded alongside a wall or 

 partition, by means of a stout pole. Thirty minutes 

 before operating, the subject should be given a drench 

 of from one to two ounces of chloral hydrate dissolved 

 in one or two quarts of tepid water. 



Technic. — The flank region anterior to the exter- 

 nal iliac spine should be freed of all hair by clipping, 

 and the field properly cleansed with a mild antiseptic 

 solution. An incision is then made as for spaying, 

 between the anterior angle of the ilium and the last 

 rib, — this incision being directed downward through 

 the skin and fascia, — and hy blunt dissection the ab- 

 dominal muscles may be separated, the operator forcing 

 his hand through the abdominal wall into the perito- 

 neal cavity. Exploration is then made of the pelvic 

 portion of the cavity, as in spaying, and as a conven- 

 ient guide, it is well to note the shaft of the ilium. 

 The operator then seizes the urogenital fold, and the 

 cord is readily and quickly traced from this point, the 

 testicle is brought to the surface and removed with the 

 emasculator or spaying scissors. The skin and fascia 



