472 W. N. F. WOODLAND 



Fig. 17 ( x9). — Entire specimen magnified 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. 18 (x55). — Longitudinal vertical section through head. 



Fig. 19 (x55). — Transverse section through the anterior end of the 

 testicular region. 



Fig. 20 ( X 55). — Transverse section through the middle of the uterine 

 region. 



Fig. 21 ( X 1060). — Eggs in optical section and surface-view to show the 

 minute spinelets on the shell. 



Wenyonia minuta. 



Fig. 22 ( X 2).— The adult specimen. 



Fig. 23 ( X 60). — The entire specimen magnified and viewed from the 

 ventral aspect. The parts of the drawing round the sexual opening 

 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. The anterior extension of the ovary to the level 

 of the sexual openings is not certain, since the ovarian follicles and vitel- 

 laria are in this region almost indistinguishable in my preparation. 



Plate 25. 

 Caryophyllaeus filiformis. 



Fig. 24 ( X 2). — -Adult specimens. 



Fig. 25 ( X 55). — Entire specimen magnified and viewed in optical section 

 from the ventral aspect (the three parts of the figure should be continuous). 

 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 vitellaria and other fine ducts are not 

 shown. The vitellaria in actuality surround the testes in the testicular 

 region — vide fig. 28. 



Fig. 26, a, b, c, cl, e { x24). — Drawings showing variation in form of the 

 head and the variable extension of the testes and vitellaria anteriorly. 



Fig. 27 ( X 78). — Transverse section through the head region. 



Fig. 28 ( X 78). — Transverse section through the testicular region. 



Fig. 29 ( X 78). — Transverse section through the anterior uterine region. 



Fig. 30 ( X 78). — Transverse section through the median isthmus of the 

 ovary. The vagina has at this level become dorsal to the uterus. 



Immature Caryophyllaeid from Auchenoglanis occidentalis. 



Fig. 31 ( x2). — The single specimen. 



Fig. 32 ( x35). — The external aspect of the specimen, viewed ventrally. 



