supporting lamella
supporting lamella
supporting lamella
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530 W. B. HARDY.<br />
singularly hyaline and structureless even with the highest<br />
powers; they do not stain at all with picro-carmine or hsematoxylin,<br />
but take a deep tinge with aniline blue and methyl<br />
green.<br />
They are of a complex character chemically, with probably<br />
a proteid basis. That they are not wholly proteid is, I think,<br />
shown by the fact that the coloration obtained with the xanthoproteic<br />
reaction, and with acidulated ferrocyanide of potassium<br />
and ferric chloride, is never intense though it is sufficiently<br />
distinct. Neither iodine nor iodine and sulphuric acid give<br />
distinctive results. They are also not of a fatty nature, for<br />
exposure for many hours to hot turpentine fails to materially<br />
change them. These are not only the most abundant, but<br />
the most permanent nutritive spheres.<br />
The second class of bodies is markedly distinct from those<br />
just mentioned, and they occur sometimes in considerable<br />
abundance. They are perhaps most noticeable at the close of<br />
a digestive act. They measure as a rule 12 /x in diameter,<br />
and are spherical bodies, each embedded in a vacuole of a<br />
vacuolate cell, which may or may not contain at the same time<br />
the small nutritive spheres. Like the latter they are sometimes<br />
homogeneous bodies showing no internal structure,<br />
and then they stain very intensely with picro-carmine (fig.<br />
27). But they may be also found composed half of intensely<br />
staining homogeneous material, and half of more turbid<br />
material which stains scarcely at all (fig. 28). In yet other<br />
cases the intensely staining material is reduced to a small<br />
spherical nodule or patch placed excentrically on the surface<br />
of the sphere. There can be no doubt that these are various<br />
stages in the formation or destruction of the same bodies, but<br />
I do not think that the evidence at my disposal justifies me in<br />
deciding which stage is which. As a general rule, however, the<br />
smallest of these bodies, perhaps but little larger than the firstmentioned<br />
type of nutritive sphere, are homogeneous and deeply<br />
staining, while without exception the largest forms are those<br />
with the deeply-staining material reduced to an excentrically<br />
placed bleb. These bodies resemble in some respects the yolk