MONOGIiAPH OF THE EXISTING CRINOIDS. 661 



MYZOSTOMtlSI TESTUIW VON GRAFF. 



Occurrence.. — Free-living. 



Host. — Nemaster ruhigi7iosa. 



Locality. — Blake Station 285, off Barbados, 13 to 40 fathoms. 



MTZ0ST0MU5I CHELONIUM il'CLENDOX. 



Occurrence. — Free-living. 



Host. — One or more of the local species of Calometridse. 



Locality. — Southern Japan, Suruga Gulf and Sagami Bay. 



MYZOSTOMUM CHELONOIDIIIM m'cLENDON. 



Occurrence. — Free-living. 



Host. — One or more of the local species of Calometridse. 



Locality. — Southern Japan, Suruga Gulf and Sagami Bay. 



MTZOSTOMUM LUTICENI VON GRAFF. 



Occurrence. — Free-living. 

 Host. — C ovmnthus parvicirra. 

 Locality. — Tonga Islands. 



MTZOSTOMUM PALLIDUM VON GRAFF. 



Occurrence. — Free-living. :i;i n' r." ;- '■• 



Hosts. — Comatula Solaris, Comanihus parvicirra, and an undetermined coma- 

 tulid referred to " Comatula?'' 



Locality. — Near Bohol, Philippines. 



MTZOSTOMUM MARGINATUM VON GRAFF. 



Occurrence. — Free-living. 

 Hosts. — Nemaster iowensi^ and A', discoidea. 



Localities. — Blake Station 155, off Montserrat, 88 fathoms; and Blake Sta- 

 tion 203, off Martinique, 96 fathoms. 



MTZOSTOMUM GRAFFI NANSEN. 



Occurrence. — Free-living. 

 Host. — Hathronietra prolixa. 

 Locality. — 



MTZOSTOMUM BREVU'ES VON GRAFF. 



Occurrence. — Free-living. 



Host. — Crlnometra, sp. ; von Graff states that the host is Antedon poutalesii, 

 but this species has not been determined with certainty. 

 Locality. — Off Carriacou, Grenadines, 163 fathoms. 



MTZOSTOMUM CARI-ENTERI VON GRAFF. 



Occurrence. — Free-living. 

 Host. — Hathrometra prolixa. 



Localities. — Triton Station 5, south of the Faroe Islands (lat. 60° 11' 25" and 

 60° 20' 15" N., long. 8° 15' 00" and 8° 08' 00" W.), 285 to 433 fathoms; off eastern 



