Journal of Cave and Karst Studies. 2001. Cover of Volume 63 Number 3:

Pristina leidyi Smith, 1896 (Annelida: Oligochaeta: Nadidae), an aquatic oligochete. This individual (body length, excluding proboscis, 1.72 mm) was collected from soft sediment of a cave stream in Fogelpole Cave, Monroe County, Illinois, in September 1999. The slide-mounted specimen (deposited in the INHS Annelida Collection) was photographed at 100x on an Olympus BX-50 compound microscope, and the image was digitally enhanced. Photograph by Steven Taylor, Illinois Natural History Survey.