140 THE DARTOS. 



without any musclar fibres. This difference of sentiment may 

 possibly have arisen from the different conditions of this part in 

 different subjects ; for in some cases there are appearances 

 which seem to justify the assertion that muscular fibres exist in 

 this structure. 



After the testicles are removed, so as to leave the cellular 

 substance, connected with the skin, if the scrotum be inverted, 

 and this substance examined in a strong light, many fibres will 

 appear superadded to the common cellular structure ; and 

 sometimes their color can be distinguished to be red. It is 

 not asserted that this will be uniformly the case ; but certainly 

 it has often been observed in this way. 



The existence of an organ which possesses the power of 

 contraction, within the skin of the scrotum and connected to it, 

 is evinced by the corrugation which takes place when the 

 scrotum is suddenly exposed to cold, after having been very 

 warm. This corrugation occurs in a very sudden and rapid 

 manner, in some cases, in which the wounded scrotum is thus 

 exposed for the purpose of dressing : for example, upon 

 removing an emolient poultice from this part some days after 

 the operation for the cure of hydrops testis by incision, if the 

 air of the chamber be cool, a motion of the scrotum will 

 take place, almost equal to the peristaltic movements of the 

 intestines. 



The Arteries of the scrotum are derived from two sources. 

 One or two small arteries, which arise from the femoral artery, 

 between Poupart's ligament and the origin of the profunda, 

 are spent upon it. These are called the external pudic arteries. 

 It also receives some small branches from the internal pudic 

 artery. 



The Nerves of the scrotum are principally derived from the 

 lumbar nerves. 



The Darios, 



— Considered as a muscle, arises on each side from the rami 

 of the pubis and ischium, and passes down to the raphe of the 

 scrotum, to which it is closely united. It is there reflected up 

 in juxtaposition with its fellow of the opposite side, so as to form 



