A flea Has smaller fleas that on him prey; and these have smaller still to bite 'em, and so proceed ad infinitum.
Potter
Polyxeni
P
Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA. PMP1@cdc.gov
D000818:Animals; D049671:History, 18th Century; D049672:History, 19th Century; D010151:Paintings / Q000266:history*; D011037:Poetry as Topic / Q000266:history; D005423:Siphonaptera