574 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



teenth and following, which are from four to five times as long as broad. Those 

 in the distal half of the stem are constricted centrally, with much swollen ends. 



The terminal stem plate is composed of two stout tapering radicular cirri, 

 which run out in opposite directions along a sponge spinule and give off more or 

 less developed lateral stumps. 



The sides of the calyx are nearly straight and diverge from the topmost 

 columnal at slightly less than a right angle. 



The distal border of the radial circlet is abruptly produced between the bases 

 of the IBr 17 forming rounded processes, which reach to nearly half their height 

 and entirely occupy the spaces between them. 



The radianal, long triangular with rounded angles, spans the distance between 

 the bases of the posterior IBr, and, gradually narrowing, extends to a point beyond 

 the base of the IBr.,, where it terminates in a broadly rounded apex. 



The IBr, are approximately square, with rounded corners, and occupy more 

 'than two-thirds of the distal border of the radials. The IBr 2 are of about the 

 same length, broadly shield-shaped with the proximal edges strongly convex, so as 

 to join the center of the distal border of the IBr! in a very obtuse point. 



There were probably 8 or 10 brachials present. 



The orals show no indication of resorption. 



Southeast of Iceland (lat. 64 16' N., long. 11 14' W.), 190 fathoms. 



Two specimens, both poorly preserved ; in one, apparently almost fully grown, 

 there are 26 columnals attached to the calyx, of which the two uppermost (beneath 

 the centrodorsal) are broad and plate-like, very thin, and much broader than those 

 following; the centrodorsal is truncated conical, the tip where it adjoins the 

 columnal just below being not quite half so broad as that columnal. The other had 

 probably 8 or 10 brachials. 



West of Iceland (lat. 64 18' N., long. 27 00' W.), 295 fathoms. 



Total length about 12 mm. 



The stem consists of 32 columnals and a broken terminal stem plate. The 

 first eight columnals are short and discoidal ; the longest are about four times as 

 long as broad ; those beyond the middle of the stem are strongly constricted cen- 

 trally, with prominent swollen ends. 



The sides of the calyx, which diverge at considerably less than a right angle, 

 are straight. 



The radials are about as high as the basals; the distal border of the radial 

 circlet is produced interradially into prominent rounded angles. 



The radianal is long and narrow, situated on the posterior rounded interradial 

 angle into which the two appressed distal angles of the two posterior radials are 

 produced, spanning the distance between the two posterior IBr t and reaching 

 anteriorly to somewhat beyond the base of the IBr. 2 . 



The IBr x occupy about two-thirds of the distal edge of the radials. 



The orals, which are much depressed centrally, are still in contact with the 

 distal border of the radial circlet. 



