CHARACTERISTIC DEEP-SEA TYPES. POLYPS. 



1-47 



few surviving Pennatulidae may have been derived. But owing 

 to the difficulty of determining satisfactorily animals of this 

 family from alcoholic specimens, we shall notice only a few spe- 

 cies which have been figured from life by Verrill. 



Sagartia abyssicola (Fig. 460) is often found attached to the 

 tubes of Hyalinoecia. . A large red or 

 orange species of Actiuauge is A. 

 nodosa (Fig. 461), the column of 

 which is covered with hard warts ar- 

 ranged in rather regular transverse 

 and vertical rows, diminishing: in size 



' O 



from the top of the column towards 



Fig. 461 . Actiuauge nodosa. 



(Verrill.) 



the base. Specimens of four inches 

 in diameter and six inches in height 



O 



are often brought up in the dredge. 

 It has been dredged off our eastern 

 coast, and extends from the Grand 

 Banks to Cape Hatteras. Its bathy- 

 metrical rano-e is from 50 to 600 



O 



fathoms. From the tentacles and 



upper part of the column is secreted 



an abundant mucus, which is highly phosphorescent. As has 



been suggested by Verrill, these Actiniae, anchored as they are 



in the mud by a basal bulb, probably lose their power of loco- 



Fig. 460. Sagartia abyssicola. 

 f. (Verrill.) 



