INFUSORIA AS PARASITES. 
309 
Fig. 26. Hoplitophrya armata, Stein. Intestinal parasite of the Earthworm, 
x 100. 
Fig. 27. Anoplophrya prolifera, Clap, and Lachm, sp, Intestinal parasite of 
marine planarian. x 100. 
Plate VIII. 
Figs. 1-5. Icthyopthirius multi ftlis y Fouquet. Ectoparasite of young Trout. 
1, adult animalcule x 100 ; 2-5, sporular reproductive phases. 
Fig. 6. Nyctotherus velox, Leidy. Endoparasite of myriapod, lulus mar- 
ginatus. x 100. 
Fig. 7. Nyctotherus Gyoeryanus, Stein. Endoparasite of Water-beetle, 
Hydrophilus piceus. x 100. 
Figs. 8 and 9. Conchoptlw'us Steenstrupii, Stein. Parasite of Garden Snail, 
x 100. 
Fig. 10. Balantidium coli , Stein. Intestinal parasite of the Human subject, 
x 100. 
Fig. 11. Balantidium entozoon, Clap, and Lachm. Intestinal parasite of Frogs 
and Toads, x 100. 
Fig. 12. Plagiotoma lumbrici, Buj. Endoparasite of the Earthworm, Burn- 
bricus terrestris. x 100. 
Figs. 18-17. Trichodina pediculus, Ehr. Ectoparasite of the fresh-water 
Polype, Hydra vulgaris. 13-15, diverse contours assumable at will, 
x 300; 16, ventral view, showing toothed ring of acetabulum; 
17, portion of tentacle of Hydra with Trichodince attached. 
Fig. 18. Licnopkora Auerbacliii , Clap. Ectoparasite of planarian Worm, 
Thysanozoon tuberculatum, x 500. 
Fig. 19. Kerona polyporum , Ehr. Ectoparasite of fresh-water Polype, 
Hydra vulgaris . x 200. 
Figs. 20 and 21. Oyclochceta spongillee , Jackson. Parasite of fresh-water 
Sponge, Spongilla Jluviatilis. 20, adult animalcule, x 2C0; 21, por- 
tion of denticulate horny ring, more highly magnified. 
Figs. 22 and 23. Trichodinopsis par adoxa, Clap, and Lachm. Parasite of in- 
testinal and pulmonary cavities of fresh-water Molluscs, genus 
Cyclostoma. 22, adult animalcule, x 200 ; 23, horny ring of basal 
acetabulum. 
NEW SERIES, VOL. IY. NO. XVI. 
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