MONOGRAPH OF THE EXISTING CBINOIDS. 673 



Localities. — Challenger Stations 170, off the Kermadec Islands, 630 fathoms; 

 170, near Kandavu, Fiji, 210, 225, or 610 fathoms; and 192, near the Kei Islands, 

 140 fathoms. 



MTZOSTOMUM INILXTOK VON GRAFF. 



Occurrence. — In indei^endent sessile cysts. 

 Hostn. — Neocomatella jmlchdla and Adelometra angustiradia. 

 Localities. — Challenger Station 192, near the Kei Islands, 140 fathoms; and 

 Blake Station 294, off Barbados, 136 fathoms. 



MYZ08T0MUM MUEEATI VON GKAFF. 

 Figs. 1300, 1.301, pi. 44. 



Occurrence. — In independent stalked cysts. 



Hosts. — HorcEometra duplex, Stiremetra breviradia, and Adelometra angusti- 

 radia. 



Localities. — Challenger Stations 170. off the Kermadec Islands, 630 fathoms, 

 and 192, near the Kei Islands, 140 fathoms ; and Blake Station 269, off St. Vincent, 

 West Indies, 124 fathoms. 



MYZOSTOMUM ASTERL^ VON M.\RENZELLER. 



Occurrence. — Endoparasitic, living within the diverticula of tlie intestinal 

 tract. 



Hosts. — Two starfishes, both beloncring to the family Asteriidse, Astenas inch- 

 ardi Perrier and Stolastenas neglecta Perrier. 



Locality. — Eastern Mediterranean. 



MYZOSTOMUM FISHERI WHEELER. 



Occurrence. — Endoparasitic; one was found in an interradial portion of the 

 coelomic cavity. 



Host. — A starfish of the family Croniasteridse, Ceramaster leptoceramus 

 (Fisher). 



Locality. — Off Point Loma, near San Diego, California, 376 to 594 fathoms. 



MYZOSTOMUM, sp. ^'' •''* "'n'^— .^'>lt:yVnr,'>V< 



Occurrence. — Free li\ang. 



Host. — Amphimetra rnolleri. 



Locality. — Padau Bay. Mergui Archipelago. 



MYZOSTOMUM, SP. 



Occurrence. — Free living. 

 Host. — Charitomefra incisa. 



Locality. — Challenger Station ITO, off the Kermadec Lslands, 630 fathoms. 

 Remarks. — Professor von Graff states that this species shows some resemblance 

 in form, thickness, and translucent marginal zone to M. brevipes. 



