6.64 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



MTZOSTOMDM LONGICIRBUM VON GRAFF. 



Fig. 1265, pi. 41. 



Occurrence.— Free-living. 



Host. — Cojnanthus parvicirra. 



Locality. — Zamboanga, Philiijpine Islands. 



MYZOSTOJIUIM WTVILLETHOitSONI VON GRAFF. 



Occurrence. — Free-living. 



Hosts. — Metacrinus costatus and M. angulatus. 



Localities. — Challenger Stations 192. near the Kei Islands, 140 fathoms:, and 

 214, off the Meangis Islands, 500 fathoms. 



MYZOSTOMUM CIRCINATUM WHEELER. 



Occurrence. — Free-living. 



Host. — Endoxocrinus alteniiciri'us or Hypalocrimis naresianms. 



Locality. — Challenger Station 214, off the Meangis Islands, 500 fathoms. 



MYZOSTOMUM VASTUM VON GRAFF. 



Occurrence. — Free-living. 



Hosts. — Comactinia echinoptera and Comanthus japonica. 



Localities. — Blake Stations 39, 16 milas north of the Jolbos Islands, south- 

 western part of the Yucatan Bank, 14 fathoms ; and 203, off Martinique, 10 to 27 

 fathoms; and southern Japan. 



JIYZOSTOMUM AGA8SIZII VON GRAFF. 



Occurrence. — Free-living. 



Hosts. — Coccometra hagenii and probably Stylometra spinifera. 



Localities. — Near Bahia Honda, Cuba, 100 fathoms: Blake Stations 32. on the 

 northern part of the Yucatan Bank, 95 fathoms; 155, off Montserrat, 88 fathoms; 

 and 269, off St. Vincent, 124 fathoms. 



MYZOSTOMUM nUBIUM VON GRAFF. 



Occurrence. — Free-living. 



Hosts. — Heterovietra crenulata (recorded as Cornatula [or Antedon\ dubia) 

 and an unidentifiable species recorded as Cornatula (or Anfedon) trigueta. 

 Locality. — Near Bohol, Philippines. 



MYZOSTOMUM MOF.ISIANUM VON GRAFF. 



Occurrence. — Free-living. 

 Host. — Eecorded as " Comafula. sp." 



Locality. — Fouquet Island, southeast of Mauritius, 18 fathoms. 

 Remarks. — The species collected by Professor Mobius at Fouquet Island were 

 Oligometra occidentalis, Tropiometra carinata^ and Dorometra mauritiana. 



