371 709 



384 722 



38 59 



380 719 



xviii LIST OF ILLUSTEATIONS. 



Sothriocephalus — 



Diagrammatic representation of the course and connections of the 



vagina, as seen in longitudinal section, 

 Egg of, with imperfectly developed embryo, being expelled by 



compression, ...•■•• 

 Bggs of, with operculum, . . . ■ ■ 



Encapauled larva of a, from the smelt, . . . ■ 375 715 

 Head of a, reared in the oat from bladder-worms from the pike 

 (after Braun), ...... 



Larva of, from the skink ( x 20), . . • .352 674 



Larva of, from the smelt, ..... 221 377 



Segment of, with yolk chambers and "yellow ducts" (after Eschricht), 370 708 

 Transverse section through the body of a larva of, . . 391 728 

 Young, from the alimentary canal of the dog, . . . 376 716 

 Young, from the intestine of the cat, after feeding with bladder- 

 worms from the pike, ..... 379 719 



Bothriocephalus cordatus — 



A number of mature joints of, . . . . . 395 737 



From man, ....... 350 674 



397 739 



Head of, from the side and from above { X 8). . . . 398 739 



Four young specimens of, ..... 401 743 



Head and anterior portion of ( X 5), . . . .140 278 



.... 394 737 



Three joints of, seen from the dorsal and from the ventral surface ( x 2), 399 739 



Transverse sections of the head of ( x 20), . . . 400 742 



Uterus of, ....... 396 737 



Botliriocephalus latns — ....... 137 275 



,, , 357 684 



(cephalic end) ( X 8), . . . . 226 389 



Ciliated embryo of ( x 500), ..... 177 327 



Club-shaped head of, . . . . . .393 734 



Development of the reproductive organs in, . . . 372 712 

 Diagrammatic representation of the course and connections of the 



vagina, as seen in longitudinal sections, . . . 367 701 



Egg of, with embryo, . . . . . .36 67 



Egg, showing yolk-cells and shell ( x 300), . . .171 321 



Eggs of (x 300), ....... 359 685 



Embryo of, escaping from its ciliated envelope, . . . 388 725 



Embryo of, in the egg, ...... 385 723 



Female generative organs of, from the ventral surface ( x 20), . 366 700 



,,.... 369 705 



Female sexual organs of, showing the uterus, ovary, shell-gland, 



and yolk-gland ( x 12), ..... 157 305 



Free ciliated embryos of ( X 500), .... 386 723 



Free embryo of, . . . . . . .40 60 



Free-swimming embryo of, ..... 70 110 



(X 500), . . . . 351 674 



(x 600), . . . .374 715 



Free-swimming embryo of, with the protoplasmic threads, &c. 387 725 



Generative organs of (ventral aspect), .... 141 278 



Head of ( x 8), . . . . . .358 684 



Larva of ( x 65), ....... 354 676 



Larva of, with protruded head, ..... 378 718 



Larvae of, from the pike, ..... 360 686 



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