]92 PROF. W. C. WILLIAMSON ON THE 



pheral extremities of these carpellary scales do not become 

 so thin as Lindley and Hutton affirmed to be the case with 

 their example. Though rolled and waterworn, the exterior 

 of our specimen rather suggests a slight thickening of those 

 extremities^ resembling what is seen in Pinus Strbbus and 

 P. Cembra. 



In fig. 2, Plate IX., which represents portions of two 

 carpellary scales, b and c, from the second section en- 

 trusted to me by Mr. Winwood, the distinctions between 

 the two woody layers are obvious at b' and b" , c and c" . 

 The several seeds, d, are borne on the upper surfaces of 

 the basal portions of the carpellary scales, each having its 

 micropilar extremity pointed downwards and inwards. 

 Each seed is invested by a firm testa, fig. i, e, Plate IX., 

 within which we have, in several of them, a thin nucellar 

 membrane ; small fragments of this membrane are seen in 

 the two seeds, fig. i,/, /; the almost unbroken membrane 

 is seen in the seed, fig. i,/', and its concave half is lodged 

 within the concavity of the testa of fig. i, e. In each of 

 two other seeds, g,g, of fig. i, a narrow tubular structure 

 extends from the outer end of the seed to its inner or 

 micropilar extremity. This is obviously the embryo-sac. 

 The large wing of the seed is more or less conspicuous in 

 nearly every instance. Thus it is nearly, if not wholly, 

 coextensive with the length of the subjacent carpellary 

 scale, as at h, h, whilst its opposite or lower portion covers 

 the upper surface of each seed, as far as its micropile. 



In most cases the wing is slightly bifid where it touches 

 the outer apex of the seed, as in h', h', a very narrow mar- 

 gin of it overlapping the sharply angular edge of the latter 

 organ. These wings therefore were very large in pro- 

 portion to the size of the seed. 



In fig. 2, which represents a portion of Miss Flood^s 

 second half of the cone, enlarged six diameters, we have 



