Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 832
Fig. 590.—Varietal modifications of Astromma. the form of a cross with equal arms ; whilst in F and G it still showsitself very conspicuously, though the spaces between the rays are ingreat part filled up by the circumferential network. Tn the five-rayed•specimens A and B, on the other hand, the… … Fig. 591.—Periclilamydium prcetextum. Fig. 592.—Stijlodyctyci gracilis. less developed, whilst the circumferential becomes more discoidal.And in C and E, while the circumferential network forms a penta-gonal disc, the radial portion is represented only by solid projectionsat its angles. The…
Microscopy
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