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Show 1882.] PROF. F. J. BELL ON THE COMATULIDiE. 535 ACTINOMETRA. albonotata alternans brachiolata (rosea) bennettii borneensis coppingeri echinoptera fimbriata multifida multiradiata lA'R-^. ab 3A'RPP"°. 0 1.2.A'Rb 0 3A'RDP°. 0 2ADb b 3A'b. a 3A'2. a 2A'D?f. ab *f 3A'Rp b 3A'Db. a 2A'RDPJ? b 1(2)A'RDP^. parvicirra paucicirra pulchella robustipinna schlegeli 3A'DP(-b). a 1.2.A'RDa. a 3A'RDPb. b . (1.2)3A'J. . A'(D)Pi. • 3A'(P)J. 3A'RDP-. X 1 2 A'R b a *3A'D-. a 1A'RD°. o 3A'D(P)a. • 3A'D(P)b-. ACTINOMETRA ANNULATA. (Plate XXXV.) Centrodorsal discoidal flat, with about 15 marginal cirri, in one row, of about 15 joints, none of which are much longer than broad, though the third, fourth, and fifth are a little so ; the succeeding joints have distinct though not prominent spines, though they are not always present on all of them. Forty arms ; the divisions very regular. First radials visible, second very wide, in contact, third also very wide, not a syzygy. Three distichals and three palmars, the axillaries syzygies. First brachials wide, in contact ; the third brachial a syzygy ; after the sixth the wedge-shape rapidly becomes apparent, and the joints strongly overlap on either side alternately ; the free edges of the joints may present delicate denticulations. Some way out the wedge-form diminishes; and then, owing to the strong projections of the ridges, the arms appear somewhat as though they were ringed. Brachial syzygies: third, tenth, fourteenth, and then at about every fourth joint. The second pinnule, which is on the second palmar, is only a very little longer than the first; both are made up of a large number of small joints; the fourth or fifth pinnule is short and fleshy. Further out the pinnules are again longer and their joints elongated and delicate. Arm nearly or quite 100 mm. long; diameter of disk 10 m m . ; cirri 8 m m . long. Cape York, North Australia. Coll. B.M. PROC. ZOOL. Soc-1882, No. XXXVI. 36 |