MYZOSTOMIDA FROM THE RKD SEA. 



99 



much doi'siventnilly coinpresseil along its whole length (text- 

 fig. 21 C); the organ is lined throughout by a distinct epithelium 



Text-fig. 22. 



Di;:,gram to show the relations between the uterus, oviduct, and nepliridia 



in Myzostoma costatum. 



Tit. Uterus. Ov. Oviduct. O. Opening of oviduct into the uterine coelom. 



N. Internal openings of the nephridia. C. Position of the cloaca. 



of comparatively large ciliated cells. Anteriorly the oviduct 

 communicates with the central ccelomic space by means of a 



7* 



