Serpent worship has been shown by many writers to be a form of sex worship. It is often phallic, and we are told by Hargrave Jennings that the serpent possibly was added to the male and female symbols to represent desire. Thus, the Hindu women carried the lingam in procession between two serpents; and in the procession of Bacchus the Greeks carried in a casket the phallus, the egg, and a serpent. The Greeks also had a composite or ideal figure. Rays were added to the head of a serpent thereby bringing it into relation with the sun god Apollo; or the crest or comb of a cock was added with similar meaning. Many reasons have been offered to explain why the serpent has been used to represent the male generative attribute. Some have called attention to its tenacity of life; others have spoken of its supposed mystic power of regeneration by casting its skin. Again, it seems probable that the form is of symbolic significance. However this may be, we find that this universal serpent worship of primitive man was a form of phallicism so prevalent in former times. Many other animals may be mentioned. The sacred bull, so frequently met with in Egypt, Assyria and Greece, was a form under which Bacchus was worshipped. R. P. Knight speaks as follows: "The mystic Bacchus, or generative power, was represented under this form, not only upon coins but upon the temples of the Greeks; sometimes simply as a bull; at other times as a human face; and at others entirely human except the horns and ears." We would probably be in error to interpret all these animal symbols as exclusively phallic although many were definitely so. Thus, while Hermes was a priapic deity, he was also a deity of the fields and the harvests; so the bull may have been chosen for its strength as well as its sexual attributes. There are many animals which were symbolic of the female generative power. The cow is frequently so employed. The Hindus have the image of a cow in nearly every temple, the deity corresponding to the Grecian Venus. In the temple of Philae in Egypt, Isis is represented with the horns and ears of a cow joined to a beautiful woman. The cow is still sacred in many parts of Africa. The fish symbol was a very frequent representative of woman, the goddess of the Phoenicians being represented by the head and body of a woman terminating below in a fish. The head of Proserpine is frequently surrounded by dolphins. Indeed, the female principle is regularly shown by some representative of water; fire and water respectively being regarded as male and female principles.