582 CONSERVATIVE ORGANS. [LECT. X. 



larger fasciculus ; while the central vessel (c.) 

 seems to terminate in a straight line on the side 

 of the vessel 3, which is one of those composing 

 the larger fasciculus. In this case it is evident that 

 the smaller fasciculus is not a separation from the 

 larger ; but is joined to it by a species of anasto- 

 mosis ; which; in the central vessel, is effected in 

 a direct manner by the application of its extremity 

 to the side of the vessel on which it terminates; 

 and, in the other six vessels, in a less direct man- 

 ner by the lateral application of a portion near the 

 extremity of each vessel, before it curves outwards 

 to the particular vessel on which it terminates. In 

 other leaves, as in those of the garde'n Lettuce for 

 instance, in which single vessels are often united to 

 large fasciculi (a. b. c. 29. page 581) and to other 

 single vessels (a. b. c. 30. page 581), the nature of 

 the first species of anastomosis, just described, is 

 still more perceptible. One of these examples 

 (28.) demonstrates, also, that the proper or re- 

 turning vessels (d. e.f.f.) unite in the same man- 

 ner as the spiral. 



Whether the communication of the cavities of 

 these united vessels be direct, as in the vessels of 

 animals, so as to allow the fluids they convey to 

 flow in a uninterrupted stream from the one to 

 the other, I have not been able to determine. It 

 is, however, evident that in the leaves of dicotyle- 

 dons, as in those of monocotyledons, all the vascu- 



