540 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



There appear to be five rather large infrabasals. 



The basals form a broad cup, which is rather more than half again as broad 

 as high, with almost straight sides. 



The radials are rhombic plates of medium size, covering the angles between 

 the basals and the orals. 



Just to the left of one of the radials, in a space formed by the excavation 

 of the right distal angle of the posterior basal, the right proximal angle of the 

 posterior oral, and the left side of the radial, lies the oval radianal. 



The sides of the orals, which are not so large as the basals, converge slightly 

 in the proximal half, and more rapidly in the distal half; a triangular area 

 extending from the proximal border as a base to a point on the median line midway 

 between the base and the tip as an apex is depressed; the tip, which projects 

 somewhat, is flattened; the sides are bent backward (outward). 



No. 16 (fig. 894, p. 533) : Dredged on April 14, 1902, in 385 meters. 



Total length (distal portion of column missing), 1.7 mm.; length of calyx, 

 0.8 mm. 



The fragment of the column attached to the calyx consists of 10 columnals, 

 of which the first is short and discoidal, the following increase in length to the 

 fourth, which is slightly broader than long, the fifth, which is slightly longer than 

 broad, and the sixth, which is twice as long as broad ; and the last four are about 

 half again as long as broad. 



There appear to be five infrabasals of moderate size. 



The basals form a long cup with almost straight sides which is about half 

 again as broad distally as long. 



The radials are roundedly rhombic plates of considerable size. 



Just to the left of one of the radials is an oval plate of similar size — the 

 radianal — situated well beyond the line of division between the posterior and the 

 right posterior basals and orals, over which the adjacent radial lies, and notice- 

 able on acxiount of its very fine reticulation. The right-hand portion of the distal 

 edge of the posterior basal is cut away for its reception. 



The orals are of about the same length as the basals, approximately long- 

 triangular in outline, tapering to a rounded tip armed with prominent spines. 

 The proximal portion, comprising a triangular area extending from a point 

 which lies between one-third and one-half of the distance between the base and 

 the tip as an apex to the two proximal lateral angles, is flattened ; a rhombic area, 

 including the tip and reaching proximally nearly to the apex of the triangular 

 area just mentioned, is also flattened. The long-triangular areas bounded 

 inwardly by these areas are bent outward and backward. 



No. 17 (fig. 895, p. 538) : Dredged on November 9, 1902, in 385 meters. 



Total length (distal portion of column missing), 5 mm.; length of calyx, 

 €.7 mm. 



The portion of the column remaining consists of 16 columnals, of which the 

 first five are very short and discoidal, though of gradually increasing length, more 

 than twice as broad as long, with a prominent projecting girdle, and the follow- 



