74 



THE DEPTHS OF THE SEA. 



[chap. II. 



the Halichondridce, with long supporting fibrous 

 beards. 



Prom its appearance when brought up Roltenia 

 evidently lives buried in the mud to its upper fringe 

 of spicules. When freshly dredged, it is loaded with 



Fig. 7.— Tisiphonia agariciformis, Wyville Thomson. Natural size. (No. 12.) 



pale grey semi-fluid sarcode, full of GlobigerincB, 

 Triloculincv, and other rhizopods, and covered in our 

 northern localities with the little ophiurid Amphiura 

 abyssicola, Sars, and the exquisitely delicate trans- 



