LIST OF ILLUSTRATIONS. XX111 



FIG. PAGE 



RJiabditis terricola, ....... 30 48 



Adult female and young, . . . . .60 95 



Embryo of, ...... 42 62 



Rhabdonema (Ascaris) nigrovenosum, Khabditoid form of, 61 97 



Rhabdonema nigrovenosum, Mature embryo of, . . . .62 97 



Sarcoptcs scabiei, * ... . ,. . . . 6 14 



,,... 86 140 



Scabies norvegica, Crust of, with mites, their borings, eggs, and excreta, 87 140 



Sclerostomum tetracanthum, encysted, . . . .14 20 



Scolcccs ( x about 30), . . . ... 217 372 



Spiroptera murina, Young form of, from the meal-worm, . + 45 68 



Sporocyst and Redia, with Cercarise in the interior, . ... 49 71 



StrongylusJHaria,F^mbryoof, . . . . . . 65 102 



Tcenia, Double joint of. with three sexual openings, . . . 258 451 



Embryo of ( x 100) . 80 132 



.... .179 330 



Tcenia ccenurus ( x 10-15), . ... . . . . .'308 568 



Cephalic end of, with hexamerous symmetry ( x 25), . . 232 396 

 Connection between the different parts of the female generative 



apparatus in, . . . . . .163 314 



Form of uterus in, ... . . . .308 568 



Joint of, with excretory vessels and generative organs ( x 10), . 154 299 



Larger and smaller hooks of ( x 280), . . . .307 567 



Sexual organs of ( x 10), ..... 158 306 



165 314 

 Tcenia crateriformis, Embryonal hooklet of, from a bird, after v. Siebold 



(x 700), 174 322 



Tcenia cucumerina, ....... 347 666 



Cysticercoid of ( x 60), ...... 211 364 



....... 338 653 



348 669 



Cysticercus of, from the dog-louse, .... 45 68 



Head of, with rostellum and hooks in different stages of 



contraction ( x 140), ..... 346 665 



Proglottides of, in a sexually mature state ( x 20), . . 349 672 



Rostellum of ( x 140), 229 393 



Tcenia echinococcus ( x 10), . . . . . .226 389 



Adult specimen of ( x 12), . . . . .138 277 



. . . 316 587 



Generative organs of ( x 80), . . . . . 318 590 



Sexual organs of ( x 100), 164 314 



Tcenia elliptica, Recently formed egg of ( x 600), . .172 321 



Sexually mature proglottis of, . . . . 143 279 



Tcenia flavo-pimctata, after Weinland ..... 344 661 



Ripe proglottides of, one barren ( x 40), . . . 345 662 



Tcenia marginata, Embryonic development of ( x 550), . . 176 326 



Form of uterus in ( x 6), . . . . < . 308 568 



Hooks of ( x 280), 304 564 



Recently formed egg of ( x 600), . . .172 321 



Tcenia mediocanellata (natural size), . . . . .67 104 



Tcenia nana ( x 18), . . . . . 340 657 

 Head of, with retracted rostellum ( x 100) ; (A) an isolated hook 



( x 600), . . ... . . .341 658 



