328 BULLETIN 82, tTNITED STATES NATIONAL MUSEtTM VOLUME 1 



FLOROMETRA GOUGHI John* 



FinuRE 17 

 Floromelra goughi John, in Vaney and John, Sci. Res. Voy. Scotia, 1902-04, Crinoidea, 1939, pp. 

 665-6G7 (station, description), p. 667 (first crinoid from Gough Island); fig. 1, p. 666. 



Diagnostic features. — Centrodorsal conical, with the bare dorsal pole very small; 

 cirri very numerous, about a hundred and with up to 38 segments; no dorsal spines on 

 the distal segments; longest proximal segments about two and a half times as long as 

 broad; division series and brachials quite smooth; third syzygy at bracliials 14 + 15; 

 grows to a size of probably over 150 mm. arm length, with the width at the fh-st syzygy 

 over 3 nun.; P, with up to 52 segments, the distal ones modified into a distinct comb. 



Description oj the holotype (from John, 1939). — The centrodorsal is conical, rather 

 swollen in the ventral two-thirds. The ventral diameter is nearly one and a third 

 times the length. The ventral edge is produced into low wide corners interradiaOy. 

 The surface of the centrodorsal is thickly covered with cirrus sockets, arranged in 

 alternating rows. The dorsal pole is very small. 



The cirri are very numerous, well over C; 16-27. They decrease in number of 

 segments and in length from the periphery to the apex. The peripheral cirri are 16-17 

 mm., the apical only 6 mm. long. The following is a description of a peripheral cirrus 

 of 27 segments and 17 mm. long. 



The first two segments are irregular, the first very short, the second only slightly 

 broader than long. The third is slightly longer than broad, the fourth twice as long 

 as broad. The fifth and sLxth, the longest in the cirrus, are more than twice as long 

 as broad. The third to sixth segments are slightly waisted. Beyond the sixth the 

 segments slowly decrease in length, but all except for the last three or four are longer 

 than broad. The tenth is about one and a half times as long as broad; the fifteenth 

 is only slightly longer than broad; the twenty-fourth is as broad as long. The ventral 

 edges of these segments are straight. The dorsal edges of the sLxth to fourteenth are 

 shghtly concave; those of the more distal segments are at first straight and then convex, 

 but no dorsal spine is developed. The distal end of each segment is wider than the 

 proximal. The opposing spine is strong and bladelike, the terminal claw cvu^ved. 



The small apical cirri are generally similar, but their segments are slightly more 

 elongated. The longest, the fourth, is three times as long as broad. 



The radials are entirely concealed in the midUne by the centrodorsal; their lateral 

 corners are visible. The IBr, are widely separated. Their breadth is equal to eight 

 times their length in the midUne. They are wider proximally than distally and are 

 fairly deeply incised by the axillarics. The axillaries are as long as broad. The distal 

 angle is considerably more acute than the proximal. The edges of these ossicles are 

 quite smooth. 



The followmg are the syzygial paii-s on one of the more complete arms: 3+4, 

 9 + 10, 14 + 15, 19 + 20, 22 + 23, 27 + 28. 



The first brachials are large and irregular and are in contact bej'ond the axillary. 

 The interior edge is short, the exterior long; the anterior edge is incised bj'^ the back- 

 ward projection of the second brachial. The second brachial is of an irregular shape 

 with a strong backward projection incising the first. The first syzygial pair is wider 



* See also Addenda (p. S37) under 1963. 



