MONOGRAPH OF THE EXISTING CRINOIDS. 667 



MTZOSTOMUM CORNUTUM VON GRAFF. 



Occurrence. — P'ree-living. 



Hostg. — Thaumatometra eyprh^ and an undeterminable species recorded as 

 Comatula (or Antedon) triqueta. 



Localities. — Challenger Station 236, south of Japan, 775 fathoms; and near 

 Bohol, Philippines. 



MTZOSTOMUM BRACHIATUM VON GRAFF. 



Occuirrence. — Free-living. 



Host. — Comatella nigra. 



Locality. — Near Bohol, Philippines. 



MTZOSTOMUM FISSCM VON GRAFF. 



Occurrence. — Free-living. 



Hosts. — Uncertain; perhaps Pachylometra in^qualis; another specimen was 

 found loose in a jar with Stephnnometra spicata and Lamprometra protectus. 



Locality. — Challenger Station 174, near Kandavu, Fiji, 210, 225, or 610 fathoms. 



Rev^arks. — Stephanometra spicata and Lamprometra protectus are both strictly 

 littoral types and could not have occurred at any of the depths given. 



MTZOSTOMUM INTERMEDIUM VON GRAFF. 



Occurrence. — Free-living. 



Host. — Zygometra microdiscus. 



Locality. — Challenger Station 187, off Booby Island, Torres Strait, 6 fathoms. 



MTZOSTOMUM QUADRIFILUM VON GRAFF. 



Occurrence.— Fv^Q-liymg. 



Hosts. — Zygometra Tuicrodiscus and Heterometra crenulata. 

 Locality. — Challenger Station 186, Prince of Wales Channel, Torres Strait, 

 8 fathoms. 



MTZOSTOMUM QUADRIGA UDATUM VON GRAFF. 



ri. :^•2, fiji. i:«4. 

 Occurrence. — Free-living. 

 Llost. — Zygometra elegans. 



Localities. — Challenger Station 190, Arafura Sea, 49 fathoms; and Torres 

 Strait, 10 fathoms, Alert. 



MTZOSTOSIUM LOBATUM VON GRAFF. 



Occurrence. — Free-living. 

 Host. — Capillaster multiradiata. 

 Locality. — Near Bohol, Philippines. 



