544 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



to the eleventh, which is twice as long as broad, and the seventeenth, which is 

 about six times as long as broad. Tlie last four gradually decrease in length, so 

 that the one just preceding the terminal stem plate is not quite twice as long as 

 broad. The elongated columnals are cylindrical, with only a slight suggestion 

 of enlargement of the ends. 



The terminal stem plate, attached to the stem of a hydroid, consists of four 

 prominent well-rounded lobes of different sizes. 



Between the bases of the basals are small triangular processes, which are 

 ' probably the distal angles of the infrabasals. 



The basals are large and broad, the distal diameter of the basal cup being 

 nearly twice as great as its height. 



The radials are rhombic, broad, almost in contact laterally. 



The prominent oval radianal rests on the right distal border of the posterior 

 basal. Its right-hand edge is directly beneath the left lower corner of the IBrj, 

 and its left-hand edge is almost directly over the distal angle of the posterior 

 basal. For its reception the left side of the right posterior radial is cut away 

 beyond a strongly concave line from just beneath the lower left-hand corner of 

 the IBrj to the middle of the right distal face of the posterior basal. 



The IBri and IBr„ and rudiments of the first brachials are present. 



The orals are very large, with their characteristic shape much accentuated. 



No. 26 (fig. 913, p. 541) : Dredged on August 12, 1902, in 385 meters. 



The crown is about 1.5 mm. in length. 



The radials have not as yet come into lateral contact, being separated by a 

 space from one-half to quite as wide as the base of the IBr,. 



The left side of the right posterior radial is cut away beyond a concave line 

 from the left-hand base of the IBr, to about the middle of the right distal border 

 of the posterior basal. 



The oval radianal lies in the area formed by the cutting away of the left 

 side of the right posterior radial, and extends as far as the line parallel with the 

 dorsoventral axis which passes through the apex of the posterior basal. 



No. 27 (fig. 914, p. 541) : Dredged on February 8, 1903, in 350 meters. 



The portion of the column attached to the calyx consists of seven columnals. 

 of which the first is very thin and discoidal; the second is thicker and lenticular; 

 the third and fourth similar, but progressively thicker; the fifth cylindrical, twice 

 as broad as long, with a broad, rough, raised girdle about its proximal half; the 

 sixth half again as long as broad, with a similar girdle just proximal to the middle; 

 and the seventh is twice as long as broad with a median girdle. 



The radials are just in contact laterally by the tips of their lateral angles. 



The radianal, which is thickened and lenticular, has been shoved outward 

 by the growth of the lower left side of the right posterior radial until it has 

 come to lie just to the right of and above the apex of the posterior basal. 



There are four brachials present. The IBr^ and the brachials are bordered 

 with large filmy covering plates. 



The orals are scoop shaped, deeply depressed in the middle. Their tips are 

 on a level with the distal borders of the IBr.,. 



