. Bulletin - United States National Museum. Science. A MOXOGRAPH OF THE EXISTING CRINOIDS 659 Diagnostic feaiures.^The cirri iiave up to 20 segments, of wliich the longest are about three times as broad in the peripheral cirri and the distal part of each cirrus is distinctly wider dorsoventrally than the proximal part; P, has up to 30 segments; P2, the first genital pinnule, is shorter, with fewer but longer segments. Description [modified by ].—The tlu-ee syntypes are all badly broken. The one from station 145 has no cirri and in the two from shallower water off Marion Island no complet
. Bulletin - United States National Museum. Science. A MOXOGRAPH OF THE EXISTING CRINOIDS 659 Diagnostic feaiures.^The cirri iiave up to 20 segments, of wliich the longest are about three times as broad in the peripheral cirri and the distal part of each cirrus is distinctly wider dorsoventrally than the proximal part; P, has up to 30 segments; P2, the first genital pinnule, is shorter, with fewer but longer segments. Description [modified by ].—The tlu-ee syntypes are all badly broken. The one from station 145 has no cirri and in the two from shallower water off Marion Island no complete peripheral cirri remain and the pinnules are all more or less broken. All three specimens appear to be males though the gonads are hard and shrunken in the one from station 145. The centrodorsal in the sj-ntj-pe lacking cirri is hemispherical, mm. in basal diameter and mm. in vertical height, viewed interradiaUy. The periphery is pro- duced intcrradially. There are L-LX cirrus sockets all over the centrodorsal for a small rough central patch. No special arrangement of the sockets is evident though some tend to form vertical lines. There are about four sockets in each line. No complete peripheral cirrus remains; according to Carpenter and to a manuscript note by Dr. Dilwyn John, they had about 20 segments. A stump of seven segments has the longest segment about three times as long as the median width. A cirrus once removed from the periphery has 17 segments and is about 7 mm. long. The basal segments are relatively more slender than those of the peripheral stump, the longest (the fifth) being nearly four times as long as wide. The five or six segments before the penultimate are distinctly \videned dorsoventrally relative to the first nine or ten segments, at the same time being considerably shorter, but the antepenultimate is still a little longer than wide. The opposing spine is moderate in size and the terminal claw curved and acute. The periphera
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