CESTODARIA 471 



Plate 24. 

 W e n y o n i a v i r i 1 i s . 



Fig. I, a,b, c (x 2). — Adult specimens as mounted on slides and probably 

 somewhat flattened. 



Fig. I, d { x2). — Three immature specimens. 



Fig. 2 ( x24). — Entire specimen magnified (the two halves of the figure 

 should be continuous) and viewed from the dorsal aspect. The parts of 

 the drawing round the sexual openings and the ovary have been made 

 somewhat diagrammatic for the sake of clarity, and the uterus is in 

 actuality full of eggs. The vitelline and other fine ducts are not shown. 



Fig. 3, a, b, r, d, e { x24). — Figures showing the variations in form of 

 the head region. 



Fig. 4 ( X 35). — Horizontal section through a much contracted head. 



Fig. 5 ( X 35). — Transverse section through the anterior region of the 

 expanded head to show the longitudinal grooves (the thick cuticle and 

 excretory channels are not indicated). 



Fig. 6 ( X 78). — Transverse section through the posterior region of the 

 head to show the longitudinal grooves, musculature and excretory net- 

 work (thick cuticle not shown). 



Fig. 7 ( xll2). — Ventral aspect of the genital openings and associated 

 ducts. 



Fig. 8 ( X 175). — Dorsal aspect of the ducts in the region of the ovary in 

 outline. 



Fig. 9 (x24).^ — The abbreviated (contracted? regenerated?) post- 

 ovarian region in one of the two specimens showing this feature. 



CaryophyUaeus laticeps. 

 Fig. 10 (x 9). — C. laticeps from Tinea vulgaris, from the dorsal 

 aspect (for comparison with Wenyonia spp.). The structures in the 

 regions of the sexual apertures and ovary are represented somewhat 

 diagrammatically, but the figure is otherwise correct. In most specimens 

 of C. laticeps, however, the uterus does not extend anteriorly to the 

 cirrus opening, at least to any extent. 



Wenyonia v i r i 1 i s . 

 Fig. 11 ( X 1060). — Egg (contained in the uterus). 



Fig. 12 ( X 78). — Transverse section through the uterine region, viewed 

 from the front aspect, showing the vagino-uterine aperture. 



Fig. 13 ( X 78). — The posterior excretory system artificially injected. 

 Figs. 14, 15 ( x24). — Immature specimens showing developing genitalia. 



Wenyonia acuminata. 

 Fig. 16 ( x2). — ^ Adult specimens (the dilated base of the head shown in 

 two of the specimens is probably not a constant feature). 



I i 2 



