. Evenings at the microscope : or, Researches among the minuter organs and forms of animal life . Zoology; Microscopy; Microscopes. 358 EVENINGS AT THE MICROSCOPE. tached from the animal, thus proving that the moving power, whatever it is, is situated in the constituent tissue itself. Under pressure the edges of the flattened acontium appear to be thronged with clear viscous globules, over- lapping one another, and protruding; indicating one or more layers of superficial cells, doubtless forming the epithelium.* As the pressure is increased, these ooze out as long pear-shaped drops, and immedi
. Evenings at the microscope : or, Researches among the minuter organs and forms of animal life . Zoology; Microscopy; Microscopes. 358 EVENINGS AT THE MICROSCOPE. tached from the animal, thus proving that the moving power, whatever it is, is situated in the constituent tissue itself. Under pressure the edges of the flattened acontium appear to be thronged with clear viscous globules, over- lapping one another, and protruding; indicating one or more layers of superficial cells, doubtless forming the epithelium.* As the pressure is increased, these ooze out as long pear-shaped drops, and immediately assume a perfectly globular form, with a highly refractive power. Below these are packed a dense crowd of tftidm, arranged transversely. Before we proceed to the examination of these curious organs in detail, it may be well to devote a moment's attention to the mechanism by which the acontia themselves are projected from the body. As this was first described (so far as I am aware) by myself, t I will take the liberty of citing some of my observations on the matter. The omission of the acon- tia is provided for by the exist- ence of special orifices, which I term cinclides. The integu- ment of the body, in the Sagar- tia, is perforated by minute foramina, having a resemblance in appearance to the spiracula of Insects. They occur in the interseptal spaces ; opening a communication between these * The thin, delicate cuticle or skin which covers all the free, un- inclosed, internal surfaces of the body. t In a memoir, entitled " Researches on the Poison Apparatus in the Actiniadae," read before the Royal Society, Feb. 4th, 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. London : Society for Promoting Christian Knowledge
Size: 1154px × 2165px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookce, bookdecade1870, booksubjectmicroscopy, booksubjectzoology
