The twelfth and final lecture of the Astrology course explains the zodiacal sign Pisces (Feb 19 - Mar 20). Quoted from the lecture:

"Let us now dive within the great ocean of the sign of Pisces; a beautiful sign, ruled by Neptune and Jupiter. Pisces is symbolized by two fish united by a hyphen between the hands of Neptune. This is a very profound symbol related with the Monad."

Read the lecture transcription.