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. 



MYZOSTOMUM INFLATOR VON GRAFF. 



Occurrence. In independent sessile cysts. 

 Hosts. Neocomatella pulchella and Adelometra angustiradia. 

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

 Blake Station 294, off Barbados, 136 fathoms. 



MYZOSTOMUM MURRAYI VON GRAFF. 

 Figs. 1300, 1301, 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 ASTERLE VON MARENZELLER. 



Occurrence. Endoparasitic, living within the diverticula of the intestinal 

 tract. 



Hosts. Two starfishes, both belonging to the family Asteriidse, Asterias rich- 

 ardi Perrier and Stolasterias neglecta Perrier. 



Locality. Eastern Mediterranean. 



MYZOSTOMUM FISHERI WHEELER. 



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

 ccelomic cavity. 



Host. A starfish of the family Goniasteridse, Ceramaster leptoceramus 

 (Fisher). 



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



MYZOSTOMUM, SP. 



Occurrence. Free living. 



Host. Amphimetra molleri. 



Locality. Padau Bay, Mergtii Archipelago. 



MYZOSTOMUM, SP. 



Occurrence. Free living. 

 Host. Charitometra incisa. 



Locality. Challenger Station 170, off the Kermadec Islands, 630 fathoms. 

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

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



