MancJiester Memoirs, Vol. li. (1907), No. 13. 13 



A slight amount of periderm formation seems to have 

 taken place under the epidermis in some sections of leaf 

 cushions of L. Hickii. 



A definite absiccession layer does not seem to have 

 been formed at the base of the leaves. 



One fact in connection with the leaf bases is interest- 

 ing, and at first rather confusing to anyone working out 

 their anatomy, which is that deep cracks developed, 

 separating the leaf cushions from one another, and thereby 

 giving an exaggerated idea of their projection. All 

 references to the level at which the leaf bases separate 

 refer to the real original level of separation, and not to 

 the bottom of this crack. 



Branching of L. Hickii. 



Two types of branching are represented in L. Hickii, 

 normal equal dichotomy, and an unequal dichotomy, 

 called by Williamson " Halonial Branching." 



The actual bifurcation in a case of equal dichotomy 

 has only been seen in a block, but it was no doubt quite 

 normal. 



An interesting point is that in one case the dichoto- 

 mous branch is " Halonial," the " Halonial " branching 

 being in a plane at right angles to that of the main 

 branch. 



The " Halonial " branches are arranged in two vertical 

 rows, any two branches on the same side being separated 

 by a considerable vertical interval, sometimes about 

 50 mm. 



The branches of opposite sides are often nearly 

 opposite one another. 



Branching of stele. 



The branching of the stele is quite of the usual 

 Halonial type (Williamson, '72, '81, '83, '93), (Weiss, :o2), 



