666 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



MTZOSTOMTJM ROTUNDUM VON GRAFF. 



Occurrence. Free-living. 



Host. Comactinia echinoptera. 



Locality. Blake Station 249, off Grenada, 262 fathoms. 



MTZOSTOMUM ORLONGFM VON GRAFF. 



Occurrence. Free-living. 



Host. Probably Comactinia echinoptera. 



Locality. Blake Station 249, off Grenada, 262 fathoms. 



MYZOSTOMUM OBLONGUM VON GRAFF. 



Occurrence. Free-living. 

 Host. Neocomatella pulchella. 



Localities. Blake Stations 210, off Martinique, 191 fathoms ; 224, off St. Vin- 

 cent, 114 fathoms; and 269, off St. Vincent, 124 fathoms. 



MYZOSTOMUM ELEOANS VON GRAFF. 



Occurrence. Free-living. 



Hosts. Comanthus par-oicirra, Comactinia meridionalis, and an unidentifiable 

 comatulid recorded as Comatula (or Antedon) triqueta. 



Localities. Near Bohol, Philippines ; and off French Reef, Florida. 



MYZOSTOMUM EVERMANNI M'CLENDON. 



Occurrence. Free-living. 



Host. Comactinia echinoptera. 



Locality. Albatross Station 2166, off Habana, Cuba, 196 fathoms. 



MYZOSTOMUM ANTENNATUM VON GRAFF. 



Occurrence. Free-living. 



Host. Recorded by von Graff as uncertain ; McClendon found it on Comanthus 

 pinguis and on Metacrinus rotundus. 



Localities. Amoy, China, and Suruga Gulf and Sagami Bays, southern Japan. 



Remarks. According to McClendon the following should be considered a 

 synonym of this species: 



MYZOSTOMUM AMBIGUUM VON GRAFF. 

 Fig. 1266, pi. 41. 



Occurrence. Free-living. 



Host. This species was found lying loose in a jar with Comatula solar-Is, 

 Comanthus bennetti, and five endocyclic comatulids. 

 Locality. Moluccas. 



