REPORT ON THE HEXACTINELLIDa. 467 



of 129 to 140 fathoms, while the beautiful Lefroyella decora was dredged at the 

 Bermudas from a depth of 435 fathoms. 



AphrocalUstes also occurs at very diverse depths. Some forms were found near the 

 Philippines at 375 fathoms, and off St. Thomas at 390 fathoms, while others occurred off 

 Ascension and St. Thomas at depths of 420 to 450, and others finally at the Bermudas 

 at a depth of 1075 fathoms. Among the Coscinoporidse, the genus Chonelasma was 

 represented at depths of 450, 630, and 1075 fathoms in the North Atlantic, the South 

 Indian Ocean, and the South Pacific. Among the Tretodictyidse the genus Hexactinella 

 occurred near Little Ki Island at a depth of 129 to 140, off the Crozet Islands at a depth 

 of 550 fathoms. Cijrtaulon and Fieldingia also occurred only near Little Ki Island at 

 depths of 129 to 140 fathoms, while Sderothamnus was found near the Banda Islands 

 at slightly greater depths, down to 360 fathoms. Of the remarkable Mseandrospongidse, 

 Dactylocalyx was found below 1000 fathoms (1075) near the Bermudas. Myliusia 

 callocyathus, and Aulocystis zittelii, on the other hand, occurred at the comparatively 

 slight depth of 129 to 140 fathoms off Little Ki Island, and at depths of 360 to 390 

 fathoms near the Bermudas and St. Thomas. 



