LIST OF ILLUSTRATIONS. 



Acanthobothrium coronatum, larval state of, after van Beneden, . 218 374 

 Amoeba coli in intestinal mucus, with blood-corpuscles, Schizomycetes, 



and similar bodies (after Lusch), . . . , 94 186 

 A nthomyia canicularis 



Larva of, , 88 143 



Larva of, from the intestine of man, . . . . 7 15 



ArchigctesSieboldi(x 60), ...... 47 69 



...... .73 116 



...... 220 376 



. . . . . . ' . 353 676 



....... 356 681 



Ascaris lumbricoides, Eggs from, 32 53 



Aspidogastcr conchicola (after Aubert), .... 48 69 



74 115 

 Balantidium coli 



In conjugation (after Wising), . . . . .129 260 



In various stages of division, . . . . .130 261 



With widely opened peristome (dorsal view), . . . 127 255 

 Bladder- worm 



From the brain, with a spirally coiled body ( x 12), , . 301 556 



From the pig, after the digestion of the bladder ( x 20), . 287 513 



Head after digestion of the caudal bladder, . . . 54 75 



Head of, from the pike, ...... 390 727 



In the anterior chamber of the eye, after de Wecker ( x 3), . 299 553 



Longitudinal section through the head process ( x 40), . . 286 506 



Of the pig, with evaginated head ( x 2), . . . 23 36 



... 285 506 



With invaginated head ( x |) . . >. . 23 36 



. . 284 506 

 Sagittal longitudinal section through the protruded head of, from 



the pike, ....... 392 128 



The head and receptacle of, from a muscle about 6 mm. in size ( x 25), 281 503 



Transformation of, into a tape- worm (Tcenia serrata), ... 26 37 



With extruded head, . . . . . 53 75 



Young, from the pike, with invaginated head, . . . 389 727 



390 727 

 Bladder- worm of the rabbit 



Cephalic end of a young ( x 45), . ' , . . .189 347 



Longitudinal section through the head of ( x 60), . . . 193 350 



Metamorphosis of, into the young tape-worm ( x 4), . . 224 382 

 Transverse section of the anterior end of, at the level of the 



suckers ( x 40), . . . . . .192 503 



Bodo saltans (after Stein), . . . . . .118 237 



b 



