534 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



The stem as preserved consists of 14 columnals, of which the first is over twice 

 as broad as long, with a projecting median girdle; the second is slightly broader 

 than long, with a projecting girdle about the proximal border; the third is about 

 as long as broad, with a projecting girdle just proximal to the middle; the fourth 

 is twice as long as broad, with a median girdle which does not project beyond the 

 general surface; and the following increase in length so that the eighth and 

 following are four times as long as broad, with a conspicuous median ring. 

 Except for the earlier columnals, which have a projecting girdle, the stem segments 

 are all cylindrical without a central construction or swollen ends. 



There are five prominent infrabasals. 



The basals form a deep cup about as broad distally as high, the sides of which 

 become almost parallel in the outer portion. 



The orals are about as long as the basals. In the proximal half their sides 

 are parallel; in the distal half the outline is approximately hemispherical, with 

 a deep notch in the median line ; a triangular area bounded by lines running from 

 the apex of this notch to the two proximal angles is flattened ; the distal and lateral 

 portions beyond this area are bent outward and backward. 



No. 3 (fig. 883, p. 533) : Dredged on November 24, 1902, at a depth of 385 meters. 



Total length, 2.2 mm. ; length of crown, 0.3 mm. 



The column consists of 15 columnals and a terminal stem plate. The topmost 

 columnal is short and discoidal, the next two are slightly broader than long, the 

 fourth is somewhat longer than broad, and the following increase rapidly in 

 length to the eighth-eleventh, which are about three times as long as broad, while 

 from this point on there is a decrease in length, so that that preceding the most 

 distal is only about twice as long as broad. 



The terminal stem plate is a circular disk. 



The presence of infrabasals can not be satisfactorily determined. 



The basals form a narrow cup which is only very slightly broader across the 

 distal border than high. 



The orals are of approximately the same length as the basals. In their proxi- 

 mal half the sides are parallel; the outline of the distal half is approximately 

 a semicircle, with a median notch. In their proximal two-thirds the orals lie in 

 planes parallel to the dorsoventral axis; the distal third is bent inward at right 

 angles to this plane. The greater part of the orals, embracing the triangular 

 region bounded by lines running from a point just beneath the distal median 

 notch to the proximal lateral angles, forms a spherical triangle of rather long 

 radius of which the apex is bent inward. The portions beyond this region on 

 either side are turned outward. Between the apex of the median notch and the 

 apex of the spherical triangle is a short keel. 



The radials are evident as minute dots in each of the angles between the orals 

 and basals. In one of these angles a larger plate, the radianal, occurs just to the 

 left of and on the same transverse plane with the radial. 



No. 4 (fig. 884, p. 533) : Dredged on November 22, 1902, at a depth of 385 meters. 



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

 0.3 mm. 



