a | = | flagellum in Fig. 27, that is supposed to extend centrad beyond the nucleus. |
b | = | twin flagella in Fig. 27, of which the centrad continuation is seen applied against the distal surface of the cells and to be continued centrad. |
c | = | capsule of lens. |
cf | = | axial fibers of cells extending centrad. |
co | = | cornea. |
concr | = | concretion cavity. |
ec | = | ectoderm. |
en | = | endoderm. |
f | = | flagella. |
flp | = | distal fiber of a long pigment cell. |
fpr | = | axial nerve fiber of a prism cell. |
fpyr | = | axial nerve fiber of a pyramid cell. |
frc | = | axial nerve fiber of the retinal cells of the simple eyes. |
gc | = | ganglion cells. |
ind | = | impression of the lens probably due to the pressure of weight against the surrounding tissue. |
l | = | lens. |
lp | = | long pigment cells. |
m | = | muscle fibers. |
namp | = | nuclei of ampulla cells. |
nc | = | network cells (Figs. 13 and 16), and nettle cells (Figs. 28, 29). |
nf | = | nerve fibers and tissue. |
nlp | = | nucleus of long pigment cell. |
nm | = | nucleus of muscle cells. |
nprc | = | nucleus of prism cell. |
npyrc | = | nucleus of pyramid cell. |
nz | = | nuclear zone. |
pr | = | prism of prism cell. |
prc | = | prism cell. |
pyr | = | pyramid of pyramid cell. |
pyrc | = | pyramid cell. |
pz | = | pigmented zone. |
r | = | retina. |
s | = | secretion in endo. of tent. and ampulla. |
sh | = | shrinkage space. |
sec | = | vitreous secretion in the lumen of the simple eyes. |
sla | = | supporting lamella. |
vb | = | vitreous body or zone. |
x | = | (1) the approximate level at which Fig. 4 should be cut transversely to give Figs. 1 and 3. (2) the thickening of the supporting lamella in Fig. 13 to support the lens. |
* | = | Point of approximation of cells of lenses in Figs. 7 and 13. |