Subject ASC0000aq9
The Intellectual observer.
v.2 (1863), (1863)
Harvard University, MCZ, Ernst Mayr Library
BHL Page 39488989
Keywords
parasite worm anatomy whip worm Illustration from microscope of details of nematode worm microscopic view whipworm yolk segmentation nuclei mesial line whip-worm sheep Trichocephalus affinis Trichuris ovis historical taxonomy zoology biology parasitology male female