670 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



MTZOSTOMUM METACRINI M'CLENDON. 



Occurrence. — Free-living. 



Host. — Metacrinus rotundus. 



Locality — Southern Japan, Suruga (jrulf and Sagami Bay. 



MYZOSTOMUM CUBANUM M'CLENDON. 



Occurrence. — Free-living. 



Host. — Uncertain. 



Locality. — Albatross Station 2156, off Habana, Cuba, 289 fathoms. 



MTZOSTOMUM DEANI m'CI-ENDON. 



Occurrence. — Free-living. 

 Hosts. — Florovietra serrafissi7?ia and F. perplexa. 



Localities. — Albatross Stations 3449, off the state of Washington, 135 fathoms; 

 and 3350, off northern California, 75 fathoms; and off Pacific Grove, California. 



MTZOSTOMUM CROSSLANDI BOULENGEE. 



Figs. 1251-1253, pi. 40. 



Occurrence. — Free-living. 



Hosts. — Heteronietra savignii, Prometra chadiricki, and an undetermined 

 comatulid. 



Localities. — Red Sea ; Ul Shubuk, and Suez Bay, in 10 fathoms. 



arYZOSTOMUM AXTARCTICUM VON STUSIMER-TRAUNEELS. 



Occurrence. — Free-living. 

 Host. — Anthometra adrdani. 



Locality. — Shores of the Antarctic continent, in 124 fathoms; winter quarters 

 of the Discovery. 



MTZOSTOMUM ASTMMETRICUM VON GRAFF. 

 Fig. 1282. pi. 43. 

 Occurrence. — Sticking fast to, and enlarging, the pinnules. 

 Host. — Endoxocrinus altemicii'ncs. 

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



MTZOSTOMUM PLATYPUS VON GRAFF. 



Figs. 1286, 1287, pi 43, and pi. 57, fig. 1363. 



Occurrence. — In swellings on the disk. In regard to these swellings P. H. 

 (Carpenter wrote to Professor von Graff: 



Among six individuals of Actinometru nolilis [Comanthina scMegelii] from Samboanga I 

 find one with some stnutui-es on the disk tlint I now reeognize as Mi/zostonia cy.sts, though 

 I did not know them in 1878. The.v seem to have no plating whatever, which is curious. I 

 send you one with the Myzostoma Inside, which I cut from a corner where the disli was torn ; 



