EYES OF CHRYSOCHLORIS HOTTENTOTA AND CG. ASIATICA. 3351 
II. C. Astarica. (a) Younger Embryo. 
Here the eye lies in the subcutaneous connective tissue, 
immediately below the dermis and its hair-roots. It is 24 mm. 
below the surface at its nearest point to the latter. 
The usual eye-muscles and associated nerves appear to be 
quite absent. A small, ill-developed gland is present inside 
the dermis, close behind the eye, but | was not able to trace 
any connection between it and the conjunctival sac. ‘The 
cavity of the latter is represented by a very much reduced 
hemispherical space, in front of the eyeball. Its external 
tube does not run direct to the surface, or at right angles to 
the anterior face of the eyeball, but coils slightly and runs in 
an oblique direction to the surface, so that light could not 
penetrate to the bottom of it, unless in a very diffused form. 
In size the eyeball is, in its antero-posterior diameter, °48 
mm., in transverse diameter ‘50 mm. 
The sclerotic and cornea are again quite similar and not to 
be distinguished from a choroid—all these three parts are 
represented by a thin fibrous capsule, which shows no trace 
of cartilage or pigment at any point. The retinal pigment 
layer lying immediately within the sclerochoroid is very 
thick-walled posteriorly, and gradually becomes thinner till, 
at the anterior part of the eyeball, it is absent for a small 
space, which may be regarded as the potential pupil. No 
cellular structure can be seen in the main mass of the 
pigment. 
At the anterior end the reflexion of the pigment layer to 
become continuous with the rest of the retina is very clear. 
The space thus left in the middle line anteriorly is occupied 
by (1) a layer of columnar cells immediately within that 
part of the sclerochoroid representing the cornea; (2) within 
this in the middle line is a group of rounded cells bounded by 
a fine membrane; (3) on either side of this group is a double 
layer of extremely flattened cells leading out towards the 
pigment epithelium and sclerochoroid ; and (4) immediately 
