454 



CONSERVATIVE ORGANS. 



[LECT. IX. 



the germ or embryon. This struc- 

 ture is illustrated in the marginal 

 cut, which displays a transverse 

 section of the bulb very consider- 

 ably magnified : a. is the upper- 

 most or largest scale., composed of 

 a mass of cellular matter enclosed in a cuticle, 

 with seven fasciculi of vessels, as marked by the 

 dots where they are divided, running through it ; b. 

 the second or lowermost, or keel scale, with its 

 vessels; and within it are the third, fourth, and 

 fifth scales, each embracing the one within it. The 

 whole of the cells are filled with minute amylace- 

 ous granules, mingled in a clear, viscid mucilage ; 

 the opacity of the fluid being greater in the outer 

 scales and diminishing in a direct ratio as these 

 approach the centre of the bulb. Each scale is 

 covered with a beautiful, readily separating epider- 

 mis. 



Making a longitudinal section of the stem of 

 the Lily, so as to divide a bulb, 

 in situ, directly through its 

 axis, we find that the fasciculus 

 of vessels a. (see marginal cut) 

 which nourishes it, and which 

 may be regarded as its um- 

 bilical cord, is a portion of the 

 bundle b. which is given off to 

 supply the leaf. As it ap- 



