BY D. MCALPINK 663 



plume-like branchlels radiating towards the skin. The dots 

 scattered through the fleah indicate the etone-cells. (Slightly 

 reduced). 



Fig.5. — Diagrammatic longitudinal section, sliowing the primary vascular 

 bundles diverging slightly from the base, and passing towards the 

 blossom-end, giving off branches on the outside, which form a 

 network with plume-like branchlets radiating towards the skin. 

 The priniar\' bundles are alternately opposite and intermediate 

 to the carpels, and give off branches on the inside supplying each 

 of the carpels dorsally and ventrally. 



Fig.6. — Fibro- vascular bundles supplying two caipels, the two outer 

 bundles being opposite to, and the inner one between the carpels. 

 Each vascular bundle is seen branching outwardly, forming a net- 

 work with plume-like branchlets, while, on the inner side, branches 

 are given off to the carpels. The primary bundles, opposite to the 

 carpels, branch and suppl}' the dorsal face of each carpel, while 

 those intermediate supply the ventral face. 



Plate xxviii. 



Fig. 7. —General distribution of the vascular bundles, as shown when the 

 skin is removed, and the flesh of the pear carefully detached. The 

 main trunks, with their innumerable branches, ramify through 

 every part, and form a complete outline of the fruit. (Slightly 

 reduced). 



Fig. 8. — Same specimen as in Fig. 7, with the various primary bundles 

 spread out so as to expose the carpels. Each bundle is continued 

 around and beyond the carpels to the blossom-end of the fruit. 

 (Slightly reduced). 



Plate xxix. 



Fig.9. — Vascular network of Achan pear, a short distance beneath the 

 skin, enveloping the flesh. The variable size and shape of the 

 meshes are shown, as well as the plume-like branchlets. (Slightly 

 reduced). 



Fig. 10. — Surface-view of skin of pear, showing the "window-cells," as in 

 the apple, but somewhat smaller ( x 100). 



Fig. 11.— Cross-section through skin and flesh, showing epidermis and hypo 

 dermal layer, together with groups of "stone-cells" in the flesh 

 ( X 100). 



Fig.l2. — Cross-section of skin, showing thickened outer walls of epidermal 

 cells (stained by fuchsin), and hypodermal layer with cells 

 tangentially arranged, and vascular bundles reaching to them 

 ( X 100). 



