A treatise on zoology . 5. Fig. XXIII. Echinoderm liistology. 1, fundamental fibrous substance, with nuclei and an embryoniccell, from Echinaster sepositus. 2, stellate embryonic mesenchyme cells of Asterias , gelatinovis connective tissue ot Spatangusinirpureus {x 200). 4, elastic fibres of connectivetissue from Asterias qlacialis. 5, fibres from stalk of a pedicellaria of same. 6, muscle-fibreof same. 7, muscle-fibre from a spine attachment of Toxopneustes lividits (x 200). 8, muscle-fibre from jaw pyramid of same ( x 250). 9, muscle-fibres from gut of Sphaerechimis esculentvs(x
A treatise on zoology . 5. Fig. XXIII. Echinoderm liistology. 1, fundamental fibrous substance, with nuclei and an embryoniccell, from Echinaster sepositus. 2, stellate embryonic mesenchyme cells of Asterias , gelatinovis connective tissue ot Spatangusinirpureus {x 200). 4, elastic fibres of connectivetissue from Asterias qlacialis. 5, fibres from stalk of a pedicellaria of same. 6, muscle-fibreof same. 7, muscle-fibre from a spine attachment of Toxopneustes lividits (x 200). 8, muscle-fibre from jaw pyramid of same ( x 250). 9, muscle-fibres from gut of Sphaerechimis esculentvs(x 175). 10, transverse section through a muscle-bundle of Asthenosoma urens; s, sheath ofconnective tissue from which proceed septa that limit the smaller divisions. 11, stromacontinued as fibrils across a suture in Spatangus purpureus, the stereom of the ossiclesdissolved away. 12, transversely striate muscle-fibres of Echinus acutus. 13, dorsal ligamentof arm of Antedon (x 125). 14, interarticular substance of Isocrinus as
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology
