Echinoidea (1903) Echinoidea echinoidea00mort Year: 1903 ECHINOIDEA. II. 5, liere; it is, however, evidently not very correctly drawn. I have seen nothing resembling the figiires Pl. XLIII. 10—11; they probably represent only small specimens of this kind of tridentate pedicellariæ. The second form (PI. X. Figs. i, 4, 24, 28, 29) is coarser and the form of the blade often somewhat irre- gnlar; it has generally some very irregnlar meshwork. This kind of pedicellariæ is fonnd on the actinal side, and especially on the peristome, even in the month they are qnite crowded, reaching some way np the
Echinoidea (1903) Echinoidea echinoidea00mort Year: 1903 ECHINOIDEA. II. 5, liere; it is, however, evidently not very correctly drawn. I have seen nothing resembling the figiires Pl. XLIII. 10—11; they probably represent only small specimens of this kind of tridentate pedicellariæ. The second form (PI. X. Figs. i, 4, 24, 28, 29) is coarser and the form of the blade often somewhat irre- gnlar; it has generally some very irregnlar meshwork. This kind of pedicellariæ is fonnd on the actinal side, and especially on the peristome, even in the month they are qnite crowded, reaching some way np the oesophagns; those fonnd here are generally more irregnlar than those on the out- side of the test (PI. X. Figs. 28—29).— It is probably this second form of tridentate pedicellariæ which is fignred in PI. XLIII. Fig. 12 of the Challenger -Ech. nnder the name of Clypeastroid-like pedi- cellaria; the val ve represented in PI. XLV. F'ig. 35 as belonging to this form is certainlv that of an ophicephalons pedicellaria, but it seems very unlikely it can belong to this form; the figure PI. XLIII. 12 does not seem so verv bad, as it wonld be in case the valve did realh- belone to it — and on the otlier hånd, this coarse form of tridentate pedicellariæ is generally invested with a rather thick, brown skin, so that by a superficial examination not much more is seen than the fignre cited shows. — Tlie ophicephalons pedicellariæ are like those of /-*. Raf/ibttiii, the valves being low and rather broad. The PI. XLV. Fig. 35 of the Challenger >-Ech. gives a rather good representation thereof. The figures PI. XXXV. 17—18 mav perhaps also represent the ophicephalons pedicellariæ; they are however, so crudely made that it is qnite nseless to specnlate on what they are meant to represent. — The triphyllons pedicellariæ are like those of P. Rathbuni. The snpporting rods of the filaments of the actinal tnbe-feet are like those of Urcchiims; spicules I have not seen. T
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