MUSEUM OF COMPARATIVE ZOOLOGY. 7 



Height, 600 mm. ; diameter of rachis, near base, 1.5 mm.; in middle, about 

 1 to 1.5 mm.; length of larger polyp-calicles, about (3 mm.; diameter, 1.5 to 

 1.75 mm. Larger ones have been obtained. 



The spicula (Fig. 4 a) of the calicles are long and slender, prismatic, with 

 strong lateral angles, or ribs, which are a little winding ; they usually taper a 

 little to the ends, which are not very acute. The larger ones measure .92 by 

 .04, .82 by .05, .82 by .037, .80 by .03, .50 by .03 mm. 



This was first described from a .specimen taken in December, 1878, in 300 

 to 400 fathoms, about forty miles southwest from the N. W. Light of Sable 

 Island, N. S., by George K. Allen, of the schooner " M. H. Perkins." Other 

 specimens were afterwards brought in by the Gloucester fishermen, from the 

 fishing banks off Nova Scotia. 



Two specimens were dredged by us, on the U. S. Fish Commission steamer 

 Fish Hawk, in 1880, off Martha's Vineyard, in 252 and 325 fathoms. 



It was dredged by the Blake in 1878-79, in the Caribbean Sea. 



List of specimens dredged by the Blake, 1878-79 : — 



Kophobelemnon scabrum Verrill, sp. nov. 



Plate I. Fig8. 5, 5 a. 5 b, 5 c. 



Body clavate, with a long stem, swollen above. About eight large promi- 

 nent polyps are rather irregularly arranged on the two sides and in front, near 

 the top, leaving a naked band on the backside, which is covered with small 

 prominent zooids. Similar zooids occur between the polyps, and entirely sur- 

 round the rachis, below the polyps, and eight longitudinal rows run down on 

 the stem; four of the rows are longer than the others, and extend over the 

 swollen part of the stem. The stem terminates in a bulb, at the base, which 

 is suicated by several grooves in our example ; above the bulb it is slender, 

 and then gradually swells into the bulbous portion, a short distance below the 

 polyps ; the surface is finely spiculose. The polyps arise from the summits 

 of large, swollen, mamillary elevations; some of them are entirely retracted, 

 but most of them have the lower part of the body exposed, in the form of a 

 strongly eight-ribbed, verruciform tubercle, which is densely spiculose, like all 

 other external parts. The zooids are rather large, obliquely appressed, and 

 directed upward; they vary considerably in size. Axis round, slender, extend- 

 ing from the apex to near the base. Color in alcohol, light gray. 



Height, 56 mm. ; breadth across body, 8 mm. ; diameter of swollen part of 

 stem, 2.5 mm.; diameter of contracted polyps, 3 mm. 



The integument is firm and coriaceous, with a rough surface, owing to an 

 abundance of small slender spicula, which lie at various angles and in several 



