. Bulletin - United States National Museum. Science. A MONOGRAPH OF THE EXISTING CRINOIDS 567. Figure 32.—Leptometra phalangium (J. Miiller): a. Longest cirrus segments of two different specimens and a segment from two-thirds of the length from the base of one; b, cirrus tip. L. cehica (Barrett and McAndrew): f, Longest segments and two from two-thirds of the length; d, tips of cirri of three specimens, the two on the left from a single specimen, the one on the inside being a more apical cirrus; e and /, centrodorsals of two specimens from SW. Ireland, , ; g, centrodorsal of
. Bulletin - United States National Museum. Science. A MONOGRAPH OF THE EXISTING CRINOIDS 567. Figure 32.—Leptometra phalangium (J. Miiller): a. Longest cirrus segments of two different specimens and a segment from two-thirds of the length from the base of one; b, cirrus tip. L. cehica (Barrett and McAndrew): f, Longest segments and two from two-thirds of the length; d, tips of cirri of three specimens, the two on the left from a single specimen, the one on the inside being a more apical cirrus; e and /, centrodorsals of two specimens from SW. Ireland, , ; g, centrodorsal of specimen from the Minch, , ; proximal part of Pi. in celtica. But, ho says, there is a considerable amount of variation in this respect, even in individual arms. Notes.—Carpenter says that the long segmented cirri characteristic of phalangium are the prevailing kind in the specimens dredged oflf Cape Sagres and off Mondego by the Porcupine; but that, in those dredged by the Dacia on the Seine Bank, this type is very largely mtermLxed with another, the terminal segments of which are rather short and broad, somewhat as in those of the Ross-shire variety. Besides the more or less long segmented cirri typical of 'phalangium, the specimens di-edged hy the Dacia on the Seine Bank bore a number of cirri much more like those characteristic of the Ross-shire form. One of these cirri has 57 [surely a mistake for 51] segments which gradually decrease in length from the middle of the cirrus onward, and the short later ones are somewhat compressed laterally, but about as broad as long. In this cirrus there are dorsal spines on both the segments preceding the terminal claw, while in another there is a third spine on the segment preceding these. The relative shortness of the segments in the outer third of the cirri is very marked in all these specimens. This "square-jointed" type of cirrus, according to Carpenter, is the most common one found in the Scottish s
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