The Crome Syrcus

The Crome Syrcus was an American rock band of the late 1960s and early 1970s. Originally founded in 1966 in Seattle, the band quickly moved to San Francisco, the group gained some minor success opening for more popular acts. Most of their recorded work was produced in 1968, including their only album. They officially broke up in 1973, but they hadn't recorded in some time.

The Loading Zone in "The Fillmore Shoggoth"
The Crome Syrcus was one of the acts HPL was opening for at a concert at the the Fillmore in Spring, 1968. However, a group of shoggoths attacked San Francisco during HPL's set, and the Crome Syrcus was unable to perform.