536 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



by lines running from the middle of the median line, which is depressed, to each 

 of the proximal lateral angles, is a triangular area which follows the contour of 

 the body ; a rhombic area bounded by the distal border and by lines from the outer 

 third of the lateral borders to the depressed point midway between the tip and 

 the base is nearly plane; laterally in the proximal two-thirds there are two tri- 

 angular areas, the obtuse apices of which lie on the depressed point midway between 

 the tip and the base, which are bent outward in such a way that their outer borders, 

 between the proximal lateral angles of the orals and the lateral angles of the distal 

 rhombic area, form a broad curve. 



No. 7 (fig. 887, p. 533) : Dredged on February 7, 1903. at a depth of 350 meters. 



Total length (distal portion of column missing), 1.5 mm.; length of crown, 

 0.3 mm. 



The column as preserved consists of seven segments, of which the first is 

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

 about as long as broad, the fifth, which is three times as long as broad, with a 

 narrow projecting girdle about the end of the proximal third, and the sixth and 

 seventh, which are about six times as long as broad. 



There appear to be five prominent rounded infrabasals. 



The basals form a deep cup, with slightly convex sides, which is not quite 

 half again as broad as high. 



No radial structures could be detected. 



The orals have parallel sides in the proximal half ; in the distal half the sides 

 converge rapidly to the rounded apex. A triangular area, of which the proximal 

 border forms the base and the central point on the median line from the base 

 to the tip the apex, is flattened; a rhombic area, including the distal portion and 

 converging to a proximal apex at the central point in the median line between 

 the base and the tip is moderately concave exteriorly ; the two narrowly triangular 

 lateral areas remaining are bent outward and backward. 



No. 8 (fig. 888, p. 533) : Dredged fii February 8, 1903, in 350 meters. 



This specimen does not differ essentially from the preceding. 



No. 9 (fig. 889, p. 533) : Dredged on February 8, 1903, in 350 meters. 



Total length (distal portion of column missing), 4 mm.; length of crown, 

 0.7 mm. 



The distal portion of the column is missing. There remain 21 columnals, 

 of which the first four are short, though of progressively increasing length, more 

 than twice as broad as long, with a prominent projecting median girdle; the fifth 

 is about as long as broad, with a projecting girdle in its proximal portion; the 

 sixth is nearly three times as long as broad, with a prominent girdle about the end 

 of the proximal third ; and the following, which have no girdle, gradually increase 

 in length to the eleventh-fifteenth, which are between five and six times as long 

 as broad, wliile the following become gradually shorter again, so that the last 

 three remaining are scai'cely three times as long as broad. The column is of the 

 same diameter throughout, and the columnals, except those with a girdle, are simple 

 cylinders without a median construction or swollen ends. 



There appear to be five well-developed infrabasals. 



