Anatomical structure of Aspidogaster conchicola. 



541 



S ventral sucker, 

 SC subcuticular cells, 

 SD shell gland, 

 SG slime glands, 

 SO so called sense organ, 

 SO' external opening of the same, 

 Sp septa of the bulbus, 

 SSP supra - septal body parenr 

 chyma, 

 T testis, 

 Tb tuba, 



TF trans, fibres of ven. sucker, 



TO transverse opening between 



expulsion (collecting) canals, 



TR first transverse ridge of 



ventral sucker, 

 TS triangular space, 

 TV transverse vitelline duct, 



U uterus, 

 uV unpaired vitelline duct, 



V vagina (vulva), 

 VD vas deferens, 

 VF vertical fibres in ven. sucker, 

 VG vaginal glands, 

 VM long, muscles of vagina, 

 VS vesicula seminalis. 



Plate 36. 



Fig. 1. Horizontal section through the centre of the mouth-funnel, 

 pharynx and beginning of the intestine. Outlined with camera lucida 



and Winkel microscope. —--. — -: — = 246 (magnification). 



O DJ GC LlVÔ O 



Fig. 2. Transverse section through the anterior end, in the plane 

 marked CO in Fig. 16. W ^/g = 108. 



Fig. 3. Median sagittal section through the anterior end. W ^/j^ =42. 



Fig. 4. Vertical longitudinal section through an alveolus of sucker, 

 in the plane marked S in Fig. 7. 



Fig. 5. Same, in the plane marked SG in Fig. 2. 



Fig. 6. Part of an oblique longitudinal section near the margine 

 of the sucker. 



Fig. 7. Transverse section, more anterior than Fig. 2, falling in a 

 plane through Ph and CPS of Fig. 3. W »/g. 



Fig. 8. Outline of Aspidogaster from the left side, with the larger 

 excretory vessels. X ^^^ 



Plate 37. 



Fig. 9. Horizontal section through the anterior end, just above 

 the diaphragm. Compare Fig. 3, 2. 



Fig. 10. A single prostate gland, taken from Fig. 9, near the 

 anterior end of the bulbus, on the right side. 



Fig. 11, Transverse section in the region of the testis. By con- 

 traction of the animal the anterior end of the testis and the posterior 

 end of the ovary have come to lie in the same plane. W ^/^ = 42. 



Fig. 12. Transverse section more anterior than Fig. 11. 



Fig. 13. Anterior end of ventral sucker as seen from below. 



Fig. 14. Horizontal (surface) section of a marginal alveolus. 



Fig. 15. Portion of the right half of the excretory system (blue 

 in Fig. 8) with a few branches followed to their termini in funnel organs. 

 Ciliary organs of vessels not represented. Outlines of ovary and testis. 



36* 



