22G A. Barclay — On a neiu Siiecies of Uredine parasitic, S/'c. [No. 2, 



radially striated appearance (fig. 4, a, b.) On my return to Simla about 

 three weeks after gathering them they refused to germinate. Possibly 

 the period during which they remain germinable had been exceeded, 

 but possibly also they were not properly preserved during these three 

 weeks. 



Such then are the morphological characters of one stage of exis- 

 tence of a uredine inhabiting the most valuable of Indian conifers. I 

 searched carefully for some clue to its further life-history but in vain. 

 As the parasite does not occur in Simla, so far as I am at present aware, 

 I have no immediate prospect of pursuing the investigation, but must 

 leave it to any to whom facilities may be offered for undertaking the 

 research. I have looked frequently on deodars for vegetable parasites, 

 but beyond the one just described I have seen no trace of any other form. 

 The remaining cycle or cycles of its development are therefore in all pro- 

 bability passed through on some other host. 



Explanation of the Plates. 



PLATE VI. 



Fig. 1. General appearance of a rosette or fascicle of leaves with four 

 needles attached. These are strongly curved whilst the unaffected leaves are 

 straight. About natural size. 



2. Appearance of secidial fructification protruding through the epidermis. 

 The black points indicate spermagonia. About 15 times natural size, as seen under 

 a field-lens. 



3. Mycelial filaments in an air-space in the parenchymatous tissue, x 580. 



4. ^cidiospores ; a and h in optic section : c, surface view showing tubercles 

 on external surface of epispore. x 580. 



5. Peridial cells, x 250. 



6. Haustorium in a parenchyma cell, x 500. 



7. Section through a ripe secidium. On the right margin the section passes 

 through the middle of a spermagonium, on the left it includes the margin of a 

 second, x 250. 



PLATE VII (Photographs). 



Fig. 8. Transverse section of an old deodar needle, normal. 

 9. The same of an affected needle. 

 „ 10. The same through an secidium, more highly magnified. 



