Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 872
face whenthese (as in the great Goniasterequestris or knotty cushion-star)are large enough to be furnishedwith a calcareous framework. Anexample of this kind, furnished bythe Astrophijton, is represented infig. 621. The spines with whichthe arms of the species of Ophiothrix( brittle star) are beset… … Fig. 621.—Calcareous plate and clawof Astrophijton. 8i6 ECHINODERMATA models for the spire of a cathedral. These are seen to the greatestadvantage when mounted in Canada balsam, and viewed by thebinocular microscope with black-ground, illumination. It is inter-esting to remark that the minute tooth…
Microscopy
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