. Seaside studies in natural history. Marine animals. Fig. 40. Figs. 37 - 40 represent the various stages of its growth. It will be seen how very short are the locomotive fringes (Fig. 39) in comparison with those of the full-grown ones (Fig. 33). It is only in the adult Idyia that these rows attain their full height, and the tubes, ramifying throughout the body (Fig. 40), are completed. The Bolina, in its early condition, recalls the young Pleurobrachia. At this period it has the same rapid motion, and when somewhat more advanced, long tentacles, resembling those of the Pleurobrachia, make th
. Seaside studies in natural history. Marine animals. Fig. 40. Figs. 37 - 40 represent the various stages of its growth. It will be seen how very short are the locomotive fringes (Fig. 39) in comparison with those of the full-grown ones (Fig. 33). It is only in the adult Idyia that these rows attain their full height, and the tubes, ramifying throughout the body (Fig. 40), are completed. The Bolina, in its early condition, recalls the young Pleurobrachia. At this period it has the same rapid motion, and when somewhat more advanced, long tentacles, resembling those of the Pleurobrachia, make their appearance (Fig. 41) ; it is only at a later period that the tentacles become contracted, while the large lobes (Fig. 42), so characteristic of Bolina, are formed by the elongation of the oral end of the body, the auricles becoming more conspicuous at the same. rig. 38. YouDg Idyia seen from the anal extremity, magai&ed *, a anal opening, other letters as in Fig. 36. Fig. 39. Idyia somewhat older than Fig. 37, lettering as before ; magnified. Fig. 40. Toung Idyia in which the ambulacral tubes begin to ramify -, magnified, letters as 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 Agassiz, Elizabeth Cabot Cary, 1822-1907; Agassiz, Alexander, 1835-1910, joint author. Boston, J. R. Osgood and Company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectmarineanimals, bookye
