. The microscope and its revelations. ii;. 680. — Holotlmrioidea : I, ,SY/r//o/;/rs Ki/crstciitii ; rt, calcareousplate of same; b, c, calcareous plates of Holothuria vagabundq ;r7, the same of H. iuJni/i/lis; t>, the same of H. botcllus; f, of : cj, of H. ediilis. the substance of the skin. Various forms of the plates which thuspresent themselves in Holothuria are shown in fig. 68(>.2 In theXf/ii(i,])ta, one of the long-bodied forms of this order, which aboundsin the Mediterranean Sea, and of which two species (the A, iligitata B

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901