The clitoris is the analogue of the male penis, with the only difference that it is not perforated by the urethra. The latter opens into the vestibule, midway between the clitoris and vaginal orifice, and is surrounded by a fold of mucous membrane. The clitoris is equipped with two erectile organs, the corpora cavernosa, and two muscles, the musculi ischio-cavernosi, and is, therefore, very erectile. The clitoris is supplied with an abundance of delicate sensory nerve-ends, including the end-bulbs and the Pacinian and Meissner’s corpuscles, and is therefore extremely sensitive. [Illustration: CUT XV. _External genitals after removal of skin. After Martin._ 1, clitoris; 2, plexus of veins in the vaginal wall; 3, glans of clitoris; 4, bulbus vestibuli; 5, orifice of vagina; 6, constrictor cunni; 7, sphincter ani; 8, anus.] _Bartholinian glands._—On either side of the vaginal orifice open the ducts of the Bartholinian glands. The two small glands are of the racemose type and not larger in size than a small pea. They are situated beneath the bulbs of the vestibule. _Hymen._—The vaginal orifice, in the virginal state, is partly closed by an imperfect septum, the hymen. The hymen is a fold of tissue, presenting a structure similar to that of the vagina. The fold is usually attached to the posterior vaginal wall. The hymen closes only incompletely the vaginal entrance, leaving an opening which varies in size from the head of a pin to a calibre which will admit the tip of one or two fingers. The opening of the hymen is, as a rule, semilunar and reaches the anterior vaginal wall. After defloration or sometimes only after the first confinement, the hymen is torn at several points and shows only remnants, the so-called carunculae myrtiformes. [Illustration: CUT XVI. _Genitals of a girl at puberty._ 1, right labium majus; 2, duct of Bartholinian gland; 3, Bartholinian gland; 4, rima pudendi.]