Manchester Memoirs, Vol. xlvi. (1902), No. 16. 9 



inner cup {Fig. 3 i. co.). It much more than fills this, how- 

 ever, and swells out anteriorly into a rounded elevation, 

 which is surmounted by the anterior cap. As regards its 

 minute structure it consists of a transparent matrix, in 

 which are a large number of very delicate wavy fibres, 

 which have been stained by the haematoxylin : they start 

 from the surface of the cone and ramify as they pass 

 inwards, and their general direction is parallel to the 

 external surface, so that they are concave towards the 

 central mass of the organ. The curvature flattens 

 posteriorly but the concavity is never lost. 



Elongated nuclei, disposed in the same direction as the 

 fibres, are found here and there among them. At the 

 margin of the posterior cup these fibres are continuous 

 with those forming the capsule of the organ. In the 

 sections they seem, as it were, to flow over the edge of the 

 cup inwards and spread out as they enter it. 



In the centre of this inner cone, and more particularly 

 in the deeper portions of it, are seen a number of the 

 scales above described. These, however, are rather thinner 

 than those forming the posterior cup; they are arranged in 

 irregular layers parallel to the course of the fibres among 

 which they lie. 



5. The anterior cap has the form of a convexo-concave 

 lens with the concavity directed backwards {Fig. 3, a.c), 

 and consists of a mass of delicate fibres closely resembling 

 those in the inner cone, in which are embedded a number 

 of scales very much like those above described. They are 

 larger and thicker than those forming the posterior cup, 

 but are not quite so closely placed. There are about four 

 layers of them in the centre, and fewer towards the margins. 

 The fibres constituting the groundwork of this cap are 

 more closely packed than those in the central cone, but 

 except for this and the presence of the lenticular bodies 



