. Evenings at the microscope : or, researches among the minuter organs and forms of animal life. Microscopy; Microscopes; Medical microscopy. 368 EVENINGS AT THE MICROSCOPE. minute, without any bulbs;—from four to seven be- tween every two of the primary ones. We won't mind these, but bringing the margin itself into focus, and moving it along the stage horizontally, we pres- ently see one and another singular organs. They are eight in all, two being placed, but irregularly, in each of the four quadratures of the circle formed by the ra- diating canals. There are auditory vesicles, or organs of
. Evenings at the microscope : or, researches among the minuter organs and forms of animal life. Microscopy; Microscopes; Medical microscopy. 368 EVENINGS AT THE MICROSCOPE. minute, without any bulbs;—from four to seven be- tween every two of the primary ones. We won't mind these, but bringing the margin itself into focus, and moving it along the stage horizontally, we pres- ently see one and another singular organs. They are eight in all, two being placed, but irregularly, in each of the four quadratures of the circle formed by the ra- diating canals. There are auditory vesicles, or organs of hearing, very closely similar to those which we see imbedded in the bosom of the Snail and other MoUusca. Plere they are comparatively large, and unusually well. OTOLITnES OF TnATJJIANTIAS. furnished. Each is a semi-oval enlargement of the flesh of the margin, in close connexion with the walls of the marginal canal, hollowed so as to inclose a capacious cavity, in which are placed a considerable number—^from thirty to fifty in this individual—of otolithes, or spheres of solid, transparent, highly re- fractive substance. They are arranged in a double line, forming a crescent, and those which are nearest the centre are longer than those towards the extremities of the line. I believe some observers have seen oscil-. 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 Gosse, Philip Henry, 1810-1888. New York, D. Appleton
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