662 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



Greenland (lat. 77° 18.5' N.. long. 18.5' W.). in 304 meters, and (lat. 76° 06' N., 

 long. 13° 26' W.), in 200 to 250 meters. 



MTZOSTOMUM AREOLATUM VON GRAFF. 



Occurrence. — Free-living. 



Hosts. — CoTTiactinia ecMno'ptera and Comactinia meridionalis (recordetd as 

 Actinometra hlahei and Actinometra meridionalis var. quadrata. 



Localities. — Blake Stations 172, off Guadeloupe, 62 to 100 fathoms; 203, off 

 Martinique, 10 to 27 fatlioms; and 278, off Barbados, 69 fathoms. 



MTZOSTOMUM TRISTE VON GRAFF. 



Occurrence. — Free-living. 



Hosts. — Comanthus parvimrra, and undetermined comatulids recorded as 

 " uncertain," and " Comatula, sp., in 111. Semper collectione No. 6 signata." 



Localities. — Near Bohol, Philippines, and Oceania ("Tahiti, Samoa, etc."). 



MYZOSTOMirM CORIACEUM VON GRAFF. 



Occurrence. — Free-living. 



Host. — Colohometra perspinosa, and "a black Actinometra (n. sp.)." 



Localities. — Port Denison. Queensland, 3 to 4 fathoms ; Jloluccas. 



Remarks. — The host of this species was originally recorded as Antedon insignis 

 Bell ; later von Graff stated, on the authority of P. H. Carpenter, that Bell had 

 changed his specific name insignis to loveni; but insignis-loveni is the same species 

 that had previously been described by Carpenter under the name perspinosa. 



MTZOSTOMUJI RADIATUM VON GRAFF. 



Occurrence. — Free-living. 



Host. — A species closely allied to, if not, Comactinia meridionalis. 



Locality. — Near Barbados. 



MTZOSTOaiU^M PULVINAR VON GRAFF. 



Occurrence. — Free-living. 



Hosts. — Leptometra celtica and L. phalangium. 



Localities. — The Minch, 60 to 80 fathoms; off Loch Scavaig. SWe; Bay of 

 Sorrento (near Naples). 



MTZOSTOStUM CALYCOTYI.E VON GRAFF. 



Occurrence. — Free-living. 



Host. — Endoxocrinus altemicirrus. 



Locality. — Challenger Station 214, off the Meangis Islands. 500 fathoms. 



MYZOSTOMUM COMPRESStTM VON GRAFF. 



Occurrence. — Free-living. 

 Host. — Hycrinus australis. 



Locality. — Challenger Station 146, in the vicinity of the Crozet Islands (lat. 

 46° 46' S., long. 45° 31' E.), 1,375 fathoms. 



