. Echinoidea . Fig. r. Fij;. 2. Fig. Fig. 4. Fig. I. Valve of a globiferous pedicellaria of Parechimts milians (Miill.) — 2. — - an ophicephalous pedicellaria of Strongylocentrotus drobachiensis (O. F. Miill.) — 3. — - a triphyllous pedicellaria of Parcchinus miliaris. — 4. — - a tridentate pedicellaria of Strongyloc. drobachiensis. In all the figures a. means the apophj-sis, b. the basal part, bl. the blade, the end-tooth, lateral teeth, /. the articiilar snrface. tions — as indeed nothing that may be of systematic importance. Above all, the most easily acces- sible and most reliabl
. Echinoidea . Fig. r. Fij;. 2. Fig. Fig. 4. Fig. I. Valve of a globiferous pedicellaria of Parechimts milians (Miill.) — 2. — - an ophicephalous pedicellaria of Strongylocentrotus drobachiensis (O. F. Miill.) — 3. — - a triphyllous pedicellaria of Parcchinus miliaris. — 4. — - a tridentate pedicellaria of Strongyloc. drobachiensis. In all the figures a. means the apophj-sis, b. the basal part, bl. the blade, the end-tooth, lateral teeth, /. the articiilar snrface. tions — as indeed nothing that may be of systematic importance. Above all, the most easily acces- sible and most reliable characters, viz. the pedicellariæ and .spicules, ought never to be omitted in systematic descriptions of Echinoids. Fam. Cidaridæ. With regard to the classification of the Cidarids, all authors seem to agree in only one thing, viz. that all attempts made hitherto at giving a natural limitation to the genera have failed. Every I) On the Spicula of the Regular Echinoidea. Transact. Linn. Soc. London. XXV. 1865. p. 365—71. l'l. 47—50. 2*
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