Te THE DEPTHS OF THE SEA. [CHAP. II. 
i 
Jeffreys dredged in 1870 several small forms of 
the Halichondride, with long supporting fibrous 
beards. 
From its appearance when brought up Holtenia 
evidently lives buried in the mud to its upper fringe 
Fic. 7.—Tisiphonia agariciformis, WYVILLE THomson. Natural size. (No. 12.) 
of spicules. When freshly dredged, it is loaded with 
pale grey semi-fluid sarcode, full of Globigerine, 
Triloculine, and other rhizopods, and covered in our 
northern localities with the little ophiurid Amphiura 
