LIST OF ILLUSTRATIONS. XXV 



FIG. PAGE 



Longitudinal section of a young, consisting almost entirely of 



head and neck ( x 60), ..... 151 295 



228 392 



234 401 

 Rudimentary heads of, at the beginning and at the end of the 



protrusion of the head ( x 20), . . . 200 and 201 354 



Twenty hours old, with incipient segmentation (x 10), . . 225 383 



Young bladder-worms of, with rudiment of head ( x 12), . 187 345 



Tcenia setic/era, Two proglottides of, from the goose, after Feuereisen, 160 311 



Tcenia solium 



Apex and hooks of, .-.. . -, ,. ,. . 139 278 



Apical surface and circle of hooks in ( x 80), . . '. 231 395 



.... 292 521 



Cephalic end of, . % ... i . . 4 8 

 Cross section of, showing middle and cortical layers under low 



power, . . . . ... . 144 281 



Cysticercus of, from the pig, . . . . .45 68 



Egg of, with shell and yolk-membrane ( x 400), . . .,- 175 322 



Eggs of, with and without primitive vitelline membrane ( x 450), 297 528 



Embryo containing egg (without yolk-membrane) ( x 400), . 173 321 



Generative organs of, . . . . 142 278 



Half -ripe and ripe joint, . . . . . . 275 489 



Half -ripe joint of (x 2), ...... 295 528 



Head of ( x 35), . . . . .227 391 



. ' . . .274 489 



. . . . . . .291 521 



Head of, from the intestine of a rabbit ( x 25), . . . 223 381 

 Head of, from the intestine of a rabbit, in different stages of 



motion ( x 25), .288 513 



Larger (anterior) and smaller (posterior) hooks of ( x 280), . 293 523 



Proglottides of, with slightly branched uterus ( x 2), . . 290 520 



Reproductive organs of ( x 10), ..... 294 526 



Two joints of, with branched uterus ( x 2), . . . 156 305 



Two proglottides of, with uterus ( x 2), . . . . 276 489 



Two segments of, with branched uterus ( x 3J), . . . 289 520 

 Tcenia torulosa 



Young form of, in Cydops serrulatus, after Grtiber ( x 25), . 212 365 



339 653 



Tcenia uncinata, Generative organs of, after Stieda ( x 25), . . 161 312 



Tcenia undutata, Rostellum of, after Nitsche ( x 100), . . 230 394 

 Tape-worm . 



Egg of, from a bird, Tcenia nymphcea, . . 33 55 



Eggs of, with six-hooked embryo, . . . .20 32 



Piece of a mummified, . . . / . . 273 485 

 Tenebrio molitor, Encapsuled tape -worm embryo, and the resulting cystic 



worm from, after Stein (x 100), . . . .180 331 



Tctrarhynchus 



Cysticercoid, from a Mediterranean percoid (x 20), . . 215 370 



Longitudinal section of a still imperfectly developed ( x 25), . 219 375 



Longitudinal section of an isolated head of ( x 10), . . 222 380 



Tetrarhynchus sepice (x 12), . . . . . 216 371 



(Isolated head) ( x 12), . ... . . 226 389 



Thetis, Blood-corpuscles of, partly with enclosed granules of pigment, 



after Hfeckel, .... 93 178 



