A treatise on zoology . )latt3 (adambulacrals), each of which bears abrachiole, except one or two of the proximal ones on the side towards thedirection of the clock-hands. lTydro])ore minute, above anus. ProtcrohlaatmyJaekel (1895; syn. , 18!)!)), Ordovician, ilussia (Fig. XLVI.).Theca ovoid, sometimes prolonged gradually into a stem (cf. Dendnx-ystis).. Fin Fnnqncyatis rarissima, recon-structfiii on the evidence ofBarrnndes flf,nres; onlarj^ed. THE CYSTIDEA 75 Thecal plates clearly differentiated into: {a) smooth, irregular, anddepressed interambulacrals ; {}>) transversely e
A treatise on zoology . )latt3 (adambulacrals), each of which bears abrachiole, except one or two of the proximal ones on the side towards thedirection of the clock-hands. lTydro])ore minute, above anus. ProtcrohlaatmyJaekel (1895; syn. , 18!)!)), Ordovician, ilussia (Fig. XLVI.).Theca ovoid, sometimes prolonged gradually into a stem (cf. Dendnx-ystis).. Fin Fnnqncyatis rarissima, recon-structfiii on the evidence ofBarrnndes flf,nres; onlarj^ed. THE CYSTIDEA 75 Thecal plates clearly differentiated into: {a) smooth, irregular, anddepressed interambulacrals ; {}>) transversely elongate at riglit angles to main food-groove, and confined to inner
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology
