The ligaments involved include the conoid ligament and trapezoid ligament. The two ligaments that form the coracoclavicular ligaments are the trapezoid and conoid ligaments. Hence the hyperbolic paraboloid is a conoid. It consists of two fasciculi, called the trapezoid ligament and conoid ligament. The conoid ligament is the posterior and medial fasciculus of the coracoclavicular ligament. It consists of two fasciculi, the trapezoid ligament in front, and the conoid ligament behind. Afterwards one deflects the bars by a directrix and generates a conoid (s. parabolic conoid). The parabolic conoid has no singular points. Rhopteries and micronemes are located below the conoid in the apical end of the cell. The spire is shortly conoid in shape. All members of this class have a complete, hollow, truncated conoid. Whitney's umbrella is a ruled surface and a right conoid. On the site there are also numerous formations of conoid shapes. The conoid spire is more or less elevated.