LIST OF ILLUSTRATIONS. XI 



Page. 

 Drawing of the specimen of Amphibamus thoracatus. c, clavicle; h., humerus; 



%., interclavicle ; o., orbit; r., radius (ulna?); v., vertebra 432 



Iomus incisus. Antenna 456 



Iomus incisus. Carinse of segments 8 and 9 456 



Iomus incisus. Gonopods, anterior side 457 



Iomus incisus. Gonopods, posterior side 458 



Stictodesmus creper. Segments 1-6. Dorsal view 461 



Stictodesmus creper. Segments 13-19. Dorsal view 462 



Chonodesmus alatus. Antenna 469 



Chonodesmus alatus. Segments 1 and 2. Dorsal view 469 



Chonodesmus alatus. Segments 4 and 5. Dorsal view 469 



Chonodesmus alatus. Segments 18-20. Dorsal view 469 



Cross section of Virgilina district at right angles to the strike of the schistosity, 



approximately along the Southern Railway 515 



Mga ornata. X8 623 



Mga ornata. Maxilliped. X65f 623 



Mga ornata. First maxilla. X65| 624 



Mga ornata. Second maxilla. X124 624 



Jxrclla armata. X 11 634 



S phyroncotsenia uncinata. Entire worm 638 



S phyroncotsenia uncinata. Head, considerably flattened by pressure 639 



S phyroncotsenia uncinata. Hook from rostellum 639 



S phyroncotsenia uncinata. Gravid segments from posterior portion of strobila. 

 ex., excretory vessel; g. p., genital pore; par. ut., para-uterine organ; ut., 



uterus 640 



S phyroncotsenia uncinata. Transverse section of sexually mature segment. 

 c. p., cirrus pouch; ex., excretory vessel; I. n., lateral longitudinal nerve; 

 ov., ovary; sem. rec, seminal receptacle; s. g., shell gland; t., testicles; t. m., 

 transverse muscles; ut., primordium of uterus; vag., vagina; v. d., vas def- 

 erens; y. g., yolk gland 641 



S phyroncotsenia uncinata. Transverse section through genital pore, cirrus 

 pouch, and neighboring structures, cl., genital cloaca; c. p., cirrus pouch; 

 ex., excretory vessel; I. n., lateral longitudinal nerve; t. m., transverse mus- 

 cles; vag., vagina; v. d., vas deferens 642 



S phyroncotsenia uncinata. Egg 643 



