PLATE I. 



Myzostoiiiti i-ynticiilfi, v. Graft. 

 Pia 1. Large individual ("female") from cyst on body-disc of Promaclocrinus kerguehnensis, ventral 



view, X 7. 



Km. -2. Same individual, dorsal view, X 7. 



Km 3 Same individual, lateral view, X 7. . 



F!,;. t Small individual ( male ) from the same cyst as the specnnen shown m Figs 



as seen when cleared in cedar-wood oil, X 38. 

 FIG. 5. Cyst on the arm of a Crinoid, X 7. 

 FIG! G. Part of the body-disc of Promaclwcrinus Icerguelenensis with attached cyst, > 



LETTERING. 



(Mi. t., Anal tube of Crinoid. 



cl., Cloaca. 



int., Branch of intestine. 



M., Myzostome protrudin- through cyst-opening. 



in., Mouth of Crinoid. 



3/>., Cyst of Myzostome. 



p.. Parapodium. 



j)//., Pharynx. 



st., Stomach. 



te, Testis. 



, Male genital opening. 



