. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. . Fiii. 233.— Developmental stages of Comatul* (Ante-Ion), much enlarged, a, free-swimminq larva with tuft and rings of cilia (Wr), also with rudimentary calcareous plates. 6, At- tached fentacrinoid form of the same animal. O, Oralia; R, Radialia; B, Basalia; Cd, Centrodorsal plato. c, Older stage described as Pentacrinui airopaeus with arms and cirri (after Thomson). and pass on to the arms, and their branches and pinnules; they are lined by soft skin, and carry the tentacle-like ambulacr
. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. . Fiii. 233.— Developmental stages of Comatul* (Ante-Ion), much enlarged, a, free-swimminq larva with tuft and rings of cilia (Wr), also with rudimentary calcareous plates. 6, At- tached fentacrinoid form of the same animal. O, Oralia; R, Radialia; B, Basalia; Cd, Centrodorsal plato. c, Older stage described as Pentacrinui airopaeus with arms and cirri (after Thomson). and pass on to the arms, and their branches and pinnules; they are lined by soft skin, and carry the tentacle-like ambulacral appendages. The anus, when it is present, lies excentrically on the ambulacral (ventral) surface of the The development of the living genus Comatula, which begins with a barrel-shaped larva with four bands of cilia and leads to the fixed stage of the Pen-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Claus, Carl, 1835-1899; Sedgwick, Adam, 1854-1913; Sinclair, F. G. (Frederick Granville), b. 1858. London, Swan Sonnenschein & co.
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