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Show 398 PROF. F. JEFFREY BELL ON THE [May 1, But the whole creature is much stouter altogether, with longer, stronger cirri, wider arms, much stronger pinnules, and a granular covering to the joints. It has a spread of 240 mm., and the cirri are about 12 m m . long. The arrangement aud number of the cirri is as described for E. indivisus; indeed there are many points in a written description of the one species which would hold for the other. However, in the new species the first two pinnules have more massive joints than the third and fourth and are quite as long, the second, indeed, being longer than the third. The other striking point of difference is the granulation of the surface of the basal joints of the arms. Prom the descriptions of Semper and P. H. Carpenter, bearing in mind that they had only one specimen and I only one, I was inclined to regard the Macclesfield Bank specimen as belonging to Semper's species ; but when I was, by the kindness of Mr. W . Percy Sladen, enabled to put the new specimen side by side with Semper's type, which is now in his possession, it was easy to see that the two could not be united. The syzygial union of the first two brachials would of itself sev&vdite E.granulatus from the three species described by Carpenter, but they are, further, all much stouter than E. granulatus, though the latter is itself very much stouter than E. indivisus, which is quite delicate. Of the latter, Dr. Herbert Carpenter says, " colour of skeleton brownish white;" it is now (January 1894) quite white; in the new species the ambulacral surface of the pinnules is a purplish brown, the rest yellowish white. The single specimen, which is in fairly good condition, was dredged at a depth of 34-40 fathoms oif Macclesfield Bank. ANTEDON INOPINATA, sp. nov. This species stands closest to the late Dr. Herbert Carpenter's granulifera-gvoxiiO, but it is distinguished from both sections thereof by having a syzygy in the third brachial. Centrodorsal large, hollowed in the centre, which is bare of cirrus-pits ; the cirri in three irregular rows on the side, long and stout, but not composed of so many as forty joints, variable in length, and about forty-five in number; the terminal joints faintly spinous. About forty-five arms, the joints of which are much compressed from side to side. The first and second radials are wide and stout, the third is short at the sides ; there are three distichals of which the axillary is a syzygy ; the arms nearly always divide again, when there are three palmars, of which the axillary is a syzygy; in rare cases there are also two post-palmars. The pinnules generally are pretty stout and stiff, the basal one very markedly stout. There is a syzygy on the third brachial, but not again for about twenty-five joints ; the arm-joints are wide, low, and very regular. Colour, in spirit, light brown, the ambulacral surface of the pinnules somewhat darker. |