660 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



MYZOSTOMUM CO8TATOM F. S. LEUCKART. 

 Figs. 1255-1262, pi. 40. 



Occurrence. Free-living. 



Hosts. Comatula Solaris, Comanthus parvicirra, H eterometra savignii, fLamp- 

 rometra palmata, Prometra chadwicki, and ophiurans commensal on Heterometra 

 savignii. Comatula, or Antedon, triqueta Semper, MS., is also given as a host of 

 this species, but this form has never been identified. 



Localities. Red Sea ; Tur, near Sinai ; Ul Shubuk, 9 fathoms ; Suez Bay, 10 

 fathoms; near Bohol, Philippines. 



MYZOSTOMUM PL1CATUM VON GRAFF. 



Occurrence. Free-living. 

 Host. Comatella stelligera. 

 Locality. Australia. 



MYZOSTOMUM RUBROFASCIATUM VON GRAFF. 



Fig. 1263, pi. 40. 

 ccurrence. Free-living. 



Host. Uncertain ; Boulenger states that his specimens were obtained from an 

 unidentified comatulid. 



Localities. Tur, near Sinai, Red Sea; Forculch Barrier Island, Red Sea. 



MYZOSTOMUM PARASTTICUM F. S. LEUCKART. 



Synonyms. Myzostomum glabrum F. S. Leuckart. 

 Myzostomum tuberculosum Semper. 



Occurrence. Free-living; this species is found on the disk in the immediate 

 vicinity of the mouth. 



Hosts. Antedon adriatica, A. mediterranea, A. bifiida, and A. petasus. 



Localities. Adriatic Sea, at Cattaro; Mediterranean Sea, at Naples. It is 

 stated to be very common on the disks of the several species of Antedon in all 

 European seas. 



MYZOSTOMUM OK3AS (I.UTKEN, MS.) VON GRAFF. 



Occurrence. Free-living. 



Hosts. Heliometra glacialis and Tropiometra picta. 



Localities. Barents Sea (lat. 76 51' N., long. 44 20' E.), 145 fathoms; 

 Barents Sea (lat. 74 71' 04" N., long. 50 23' E.), 84 fathoms; Porcupine Station 

 57, 1869, southeast of the Faroe Islands (lat. 60 14' N.; long. 6 17' W.), 632 

 fathoms ; Jan Meyen ; Proven, north Greenland, 50 fathoms ; Challenger Station 48, 

 Le Have Bank (lat. 43 04' N.. long. 64 O. r >' W.), 51 fathoms; Bahia, Brazil. 



MYZOSTOMUM GIGANTEUM NANSEN. 



Occurrence. Free-living. 

 Host. Hathrometra prolixa. 

 Locality. 



