natural history, a name given by Linkius and some other authors to a kind of *Jella marina* or sea star-fish, composed of five principal rays, with several transverse hairy or downy processes.

Pentachord (compounded of *zvnt five*, and *xov* string), an ancient musical instrument with five strings. The invention of the pentachord is referred to the Scythians; the strings were of bullock's leather, and they were struck with a plectrum made of goats horn.