238 PROCEEDINGS OF SOCIETIES. 
the connective frame of the layer of inner granules. It transmits 
(a) the radial fibres, (3) fibres proceeding radially outwards from 
the ganglion-cells and bundles of optic nerve-fibres, and () fibres 
passing inwards from the rod- and cone-bodies. 
10. The ganglion-cells communicate by axis-cylinder-like fibres 
with the bundles of optic nerve-fibres, and send similar fibres 
outwards, which have been traced some distance in the granular 
layer. 
TL In the frog and Spanish Gecko the author has a few times 
traced fibres proceeding from the bundles of optic nerve-fibres for 
some distance in a radial direction in the granular layer. 
12. Miiller’s radial fibres arise by expanded roots at the outer 
surface of the membrana limitans interna, pass radially through 
the layers, contributing in their course to the granular layer, to 
the areolar frame of the layer of inner granules, and end in the 
intergranular layer and at the inner surface of the membrana 
limitans externa. They are a connective and not a nervous tissue, 
and do not communicate between the basilary element . and 
ganglion-cells. 
13. The orderly arrangement of the several lavers and their 
elementary parts is maintained by a frame of connective tissue 
which consists of—l, an unbroken homogeneous membrane 
bounding the inner surface of the retina, the membrana limitans 
interna; 2, a fenestrated membrane which holds the rods and 
cone-bodies, the membrana limitans externa, first correctly 
described by Schultze; 3, an intermediate system of tie-fibres— 
Miiller’s radial fibres—connected with which in the layer of inner 
granules are certain oblong and fusiform bodies of uncertain 
nature; 4, the intergranular layer; 5, an areolated tissue, open in 
the layers of outer and inner granules, and very closely woven in 
the granular layer. 
14. No blood-vessels occur in the reptilian retina.—‘ Proc. of 
Royal Soc.,’ Vol. XITI, p. 138. 
Hutt Micro-PHILosoPpHICcAL SOCIETY. 
The fifth winter sessional course of this Society, comprising 
twelve meetings (bi-monthly), for the purpose of delivering 
papers, with discussions thereupon, terminated on the 11th day 
of March last; the attendances were generally good, and a lively 
interest in microscopical research duly maintained. 
George Norman, Esq., the President, gave the opening subject, 
“On Cleaning Diatomaceous Deposits,” stating that the first im- 
portant point to be ascertained is, the nature of the material 
which binds the mass together. In the generality of deposits, 
this seems to be aluminous earthy matter, often mixed with some 
siliceous material which renders the action of acids of little avail. 
When the bulk of the deposit is clayey matter, the best plan is 
to place the lumps broken quite small into a vessel, and pour on 
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