A MONOGRAPH OF THE EXISTING CRINOIDS 297 



proportions with yellow or white, more rarely entirely violet or entirely yellow or 

 white. Specimens from deep water are purple or red, marked as in the others. The 

 color in alcohol is brown marked with yellow. 



Notes. — The specimen from Simons Bay collected bj' the Gauss is a small imma- 

 ture example. The cirri are intermediate in character between those of mature indi- 

 viduals and those of Antedon bifida. The brachials are wedge-shaped, not quite twice 

 as broad as the greatest length. They bear on the distal edge numerous regular fine 

 sharp spines which are continued proximally over the dorsal surface of the brachials 

 as fine elevations. The lateral borders of the elements of the IBr series and the first 

 two brachials are not wholly in contact laterally, and through the laterally extended 

 ventrolateral edges, as in the species of Stephanometra, show the beginnings of the 

 condition seen in the adults. There is no trace of a median keel on the brachials. 

 The disproportion in size between the ossicles of the IBr scries and first two brachials, 

 and the brachials following, is not as yet pronounced. The color in life was golden- 

 yellow, orange to somewhat brownish, with regular black spots broadening out- 

 wardly on the arms and ciiTi. The cirri are lighter and appear whitish, and the black- 

 ish spots purple in alcohol. This individual is comparable to the young specimen 

 figured (as Antedon duheni) by Carpenter, but it is somewhat less developed. The 

 brachials are relatively considerably longer, although the chri are somewhat more 

 matured. 



In the specimen collected by Dr. Mortensen in False Bay, according to Gisl6n, 

 the centrodorsal is discoidal, 7.5 mm. in diameter at the base with the flat doi-sal pole 

 6 mm. in diameter. The cirri are XXI, 28-32, from 25 to 30 mm. long, and are ar- 

 ranged in a partially double row. All the segments are short, the proximal being 

 three times as broad as long and the distal from twice as broad as long to half again as 

 broad as long. The dorsal profile of the cii'ri is slightly serrate, but there are no dorsal 

 spines. There are traces of a very indistinct opposing spine. The radials are visible 

 as very narrow bands which are almost broken off in their center. The IBrj are six 

 times as broad as long. The IBrj (axillaries) are twice as broad as long, 6.5 mm. broad, 

 forming with the IBr, a blunt synartlirial tubercle. The 10 arms are 110 + nun. long. 

 The first brachials are twice as long exteriorly as interiorly, and are almost free interiorly. 

 The second brachials are longer exteriorly than interiorly, exteriorly in close apposition 

 with their neighbors on adjacent rays though not flattened against them. The follow- 

 ing brachials are rectangular until about the tenth, then wedge-shaped and a httle thick- 

 ened, especially in the mediodorsal lino at the distal edge. This thickening graduaUy 

 develops into a blunt dorsal spine wliich in the middle of the arm is distinctly visible 

 in lateral view, distally disappearing. The middle and distal brachials are short and 

 discoidal. Dr. Gisl6n gives the distribution of the syzygies on two arms as foUows: 

 brachials 3+4, 7+8, 10 + 11, 18 + 19, 28 + 29; and 3 + 4, 7 + 8, 14 + 15,23 + 24,32+33. 

 The distal intersyzygial interval is 8-13 muscular articulations. Pi is 15.5 mm. long 

 with 21 segments. Pj is 13 mm. long wath 20 segments. Pa is 14 mm. long with 23 

 segments. P^ is 13 mm. long with 21 segments. .(Ul the proximal pinnules are 

 smooth, and are prismatic after the first few segments. Pj is slender. Pj and the 

 pinnules foUowing have each a long gonad. The distal pinnules are 11-12 mm. long 

 ^vith about 32 segments. The centrodorsal, cirri, and arm bases^are purplish brown. 

 The middle and distal portions of the arms and the pinnules are mottled white and 



724008 — 47 20 



