MONOGRAPH OF THE EXISTING CRINOIDS. 

 MYZOSTOMUM FOLIUM VON GRAFF. 



Occurrence. Free-living. 



Host. Cyllometra rnanca. 



Locality. Challenger Station 192, near the Kei Islands, 140 fathoms. 



MYZOSTOMUM MEMBRANACEUBI VON GRAFF. 



Occurrence. Free-living. 

 Host. Stephanometra spicata. 



Locality. Challenger Station 208, Philippine Islands (lat. 11 37' N., long. 

 123 31' E.), 18 fathoms. 



MTZOSTOMUM BUCCHICHII VON WAGNER. 



Occurrence. Free-living. 

 Host. Antedon adriatica. 

 Locality. Near Clemente Island, south of Lesina, Dalmatia. 



MTZOSTOMUM CIRMPEDIUM VON GRAFF. 



Occurrence. Free-living. 



Host. Metacrinus rotundus. 



Locality. Sagami Bay, southern Japan, 70 fathoms. 



MTZOSTOMUM NANSENI VON GRAFF. 



Occurrence. Free-living. 



Host. This species was found lying loose in a jar containing a black comasterid 

 and several other comatulids. 

 Locality. Moluccas. 



MTZOSTOMUM JAPONICUM M'CLENDON. 



Occurrence. Free-living. 



Hosts. Two ophiurans, both belonging to the family Trichasteridse, Ophiocreas 

 oedipus Lyman, and Astroceras pergamena Lyman. 



Localities. Albatross Stations 3755, off southern Japan, 52 to 77 fathoms, and 

 4979, off southern Japan, 943 fathoms. 



Remarks. It is of course possible that these myzostomes are of accidental 

 occurrence on the ophiurans, having crawled onto them from crinoids inhabiting 

 the same localities. 



MYZOSTOMUM SMITHI M'CLENDON. 



Occurrence. Free-living. 



Hosts. One or more of the local species of Calometridae. 



Locality. Southern Japan, Suruga Gulf and Sagami Bay. 



Occurrence. Free-living. 



Host. Metacrinus rotundus. 



Locality. Southern Japan, Suruga Gulf and Sagami Bay. 



