Astrological Symbol for Lumbricus the Earth Worm

Oddly their is a 'Heavenly Earth Worm" in the night sky, hidden from the logical rubric of the IAU.

Astrological Symbol for Limax the Slug

The Cosmic Slug is real, historically speaking. 

Astrological Symbol for Vexillum the Flag

The Southern Circle of Sculptor

This is a special line of latitude at nearly 27.3 degrees south. It is where the Milky Way's south pole appears directly overhead from Earth's point of view.

The Northern Circle of Coma Berenice

This is a special line of latitude at 27.3 degrees north. It is where the Milky Way's north pole crosses the sky directly overhead.

The Sub-Tropic of Auriga

The "Sub-Tropic of Auriga" is a special line of latitude for the northern hemisphere. It is at this latitude, 28.9 degrees north, that our view of Milky Way's Outer Rim is directly overhead.

The Sub-Tropic of Sagittarius

The "Sub-Tropic of Sagittarius" is a new line of latitude that marks the overhead of the Milky Way's Inner Core. It is at approximately 28.9 degrees south.