MONOGRAPH OF THE EXISTING CRINOIDS. 663 



MYZOSTOMUM BREVICIRRTTM VON GRAFT. 



Occurrence. Free-living. 

 Host. Comanthus parvicirra. 



Localities. Between Swatow and Formosa (Taiwan) (lat. 23 20' N., long. 

 118 30' E.), 17 fathoms, and the Tonga Islands. 



MYZOSTOMUM PICTUM VON GRAFF. 



Occurrence. Free-living. 



Host. Probably Stylometra spinifera. 



Locality. Blake Station 157, off Montserrat, West Indies, 120 fathoms. 



MTZOSTOMUM NIGRESCENS VON GRAFF. 



Occurrence. Free-living. 

 Host. Comanthus parvicirra. 

 Locality. Tokyo Bay, Japan. 



MYZOSTOMUM CIRRIFERUM F. 8. LF.UCKART. 



Synonyms. Cyclocirra thompsonii J. Miiller. 

 Myzostomum thomsoni Diesing. 

 Myzostomum schultzeanum Diesing. 



Occurrence. Free-living. 



Hosts. Antedon petasus, A. bifida, A. mediterranea, A. adriatica, and Hath- 

 rometra prolixa. 



Localities. Probably cold area, Faroe Channel (Porcupine, 1869) ; Triton 

 Station 3, on the Faroe Banks (lat. 60 39' 30" N., long. 9 06' 00" W.), 87 

 fathoms; Norway; Arendal, Norway; western coast of Sweden; Cattegat; Bressay 

 Sound, Shetland, 5 to 7 fathoms ; " northern seas " ; Arran, 5 to 10 fathoms ; Isle 

 of Man ; Oban ; Keumaes Bay, north coast of Anglesea ; Torquay ; Ireland ; Naples ; 

 Trieste. 



Remarks. This is the species that was mistaken by Delle Chiaje for a madre- 

 poric plate. Miiller recognized his figure as representing a parasite similar to the 

 one to which attention had already been called by J. V. Thompson, upon which he 

 bestowed the name of Cyclocirra thompsonii. 



MYZOSTOMUM CERRIFEROIDIUM M ? CLENDON. 



Occurrence. Free-living. 



Hosts. Crinometra insculpta and Analcidometra armata. 

 Localities. Albatross Stations 2752, off St. Vincent, West Indies, 281 fathoms; 

 2753, off St. Vincent, 281 fathoms ; and 2146, near Colon, 34 fathoms. 



MYZOSTOMUM CRENATUM VON GRAFF. 



Occurrence. Free-living. 

 Host. fComactinia meridionalis. 



Localities. Blake Station 203, off Martinique, 10 to 27 fathoms; and Inves- 

 tigator Station near St. Lucia (lat. 13 22' N., long. 61 07' W.), 278 fathoms. 



14214021 Bull. 82 44 



