43 



12. Ventral view of kidney and generative organs after slitting open the cloaca. 



SCYLLIUM 



(a) Male : testis ; vasa efferentia ; vas deferens ; seminal vesicle ; sperm sac ; metanephros ; ureter ; cloaca ; 

 anus ; urino-genital papilla ; abdominal pouches ; pelvic fins. 



(b) Female : ovary ; oviduct ; internal opening of oviduct ; shell gland ; cloacal opening of oviduct ; metanephros ; 

 cloaca ; amis ; urinary papilla ; abdominal pouches ; pelvic fins. 



