1885.] NATURAL SCIENCES OF PHILADELPHIA. 23 



this inner cambium, inwardly, just as they did outwardly, in the 

 usual form of cambium layer. He also remarked that bast fibres 

 had long been known to exist in the pith of Tecoma radicans, 

 and in this case something like an inner cambium would be found, 

 though it is more obscure. Sambucus Canadensis also exhibited in 

 the very large stems a smaller pith than in those of moderate size. 

 In this there was nothing comparable to the inner cambium. He 

 also remarked that for the past two winters his attention had 

 been called to the presence of considerable quantities of chloro- 

 phyll in the pith of Lycium vulgare. This was not confined to 

 the smallest stems, but was found also in those of over a quarter 

 of an inch- in diameter, and where of course a considerable belt 

 of hard wood was found between the pith and the outer 

 zone, where chlorophyll is expected. It was also observed in 

 Lycium that the chloroph3'll was not in the form of bodies but 

 diffused in character, as it is said to be in some infusorians. In 

 Lycium the cells of the pith showed, in winter, abundance of 

 protoplasm which had the nucleus on one side and very striking 

 bands extending thence across the cell to the further side. 



The following was ordered to be printed : — 



