The corpus clitoridis of dog extends in a cranio caudal direction along the median line of the lower part of the sinus urogenitalis, gradually losing size toward the caudal side, and ends in the glans clitoridis. It is surrounded by a tunica albuginea consisting of one circular layer. This corpus is made up of fat tissue, which is taken place by a mass of connective tissue cells of cartilaginous hardness in the part nearer to the glans clitoridis.The fossa clitoridis of blind-sac form, into which the sinus urogenitalis opens, extends down to the radical part of the clitoris and forms mucous folds there. In other words, the canine clitoris is a formation hanging down from the ventral wall of the sinus urogenitalis toward the fossa clitoridis, forming the glans clitoridis in the caudal and the radix clitoridis in the cranial part. A sagittal section of it reminds that of a finger, the corpus clitoridis of connective tissue being like the end phalanx and the glans clitoridis like a finger-ball.The cross-section of the glans clitoridis is tomato-shaped and is lined with a thin non-cornified stratified flat epithelium, which is free from papillae growing out of the propria. The radical part, however, is covered with a very thick stratifified epithelium containing very large cells rich in glycogen, into which well developed papillae grow from the propria. That is, the radical part is covered by an extension of the mucous membrane of the fossa clitoridis proper, so that this mucous membrane may be taken to represent a part of the inner lamella of the praeputium.A corpus cavernosum glandis is found in formation only in the radical part of the clitoris. The propria around this body is very rich in smooth muscle fibres, a condition continuing down to the middle part of the glans clitoridis. In the part of the glans more caudal to that, smooth muscle fibres are entirely absent, the propria consisting only of a connective tissue layer rich in cells.The n. dorsalis clitoridis consisting of several nerve bundles runs along the ventral side of the corpus clitoridis in its cranial part but in the more caudal parts they are reoriented more to the lateral. They send out small branches into the tunica albuginea around the corpus in their courses. This nerve subdivides into more numerous rami in the radicral part of the clitoris, which send out minuter branches into the propria of the praeputium. In the part where the fat tissue of the corpus clitoridis is replaced by connective tissue, nn. dorsales clitoridis dexter et sinister become further ramified into more numerous bundles and extend as far as to the ventral side of the corpus clitoridis, to send nerve branches into the propria rich in smooth muscle fibres in this part. The nn. dorsales clitoridis branch further into yet more numerous fine nerve bundles upon entering the glans and give off many branches into the propria.N. dorsalis clitoridis consists of many thick sensory fibres and a small number of vegetative fibres. The vasa dorsalia clitoridis are surrounded by well developed perivascular plexus of vegetative fibres. The vegetative fibres entering the corpus cavernosum glandis originate in this plexus and the vegetative fibres in n. dorsalis clitoridis.No PACINIAN body was found formed in the course of the n. dorsalis clitoridis of dog.A rather large number of genital nerve bodies Type III originating in the n. dorsalis clitoridis were found in the tunica albuginea of dog corpus clitoridis. These are non-capsulated spindle-shaped or ellipsoid bodies rich in special nuclei, with sensory fibres ending in branched terminations in them.The terminations of the sensory fibres from the n. dorsalis clitoridis are formed in the subepithelial propria of the praeputium and glans clitoridis. Their terminations are in most cases of the branched type. Namely, a thick sensory fibre, after losing its myelin sheath, is divided into a more or less large number of branches