161 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, 1890. 



grape- like mass of button-like haustoria may be seen within a cell 

 (fig. 1, Plate A). 



Before the cocidia are formed numerous spermogonia cover the 

 surface of attacked parts. These are remarkably small and super- 

 ficial (fig. 2 Plate A.) being superficial to the epidermis. They are 

 flat, circular bodies, measuring from 100 to 120 m in diam. and 30 

 to 40 /* in height. They are of the usual structure and call for 

 no special description. 



The acedia as already noted are bluntly conical bodies, about 1 m.m. 

 in height above the host's surface, and 1 mm. in diameter. They are 

 very deeply set, the basidial layer being about 0*378 mm. below the 

 outer surface of the epidermis. The basidial layer is very regular 

 and flat, and beneath it is a large mass of convoluted hyphse (fig. 3, 

 Plate A.) 



The perid ium is very resistant and tough, but is composed of a 

 single layer of flat angular cells (fig. 4, Plate A), Each cell is bevelled 

 both above and below like the edge of a chisel ; the bevelled edge 

 of the upper end overlapping the cell above externally. The outer 

 surface of each cell is thickened. The thickness of the peridial layer 

 is 20 m. 



The cecidiospores are extremely numerous within each peridium. 

 They are given off in very long rows, the lowermost being extremely 

 small, and indeed look like the stalks of teleutospores septated 

 (fig. 3, Plate A). Not having seen any fresh specimens I am not 

 aware of the colour of the ripe spores. In order to obtain the following 

 characters of the ripe spores, I first placed fragments of the host 

 bearing ripe but unopened cecidia which had been hardened in alco- 

 hol into a mixture of equal parts of alcohol and glycerine for 24 

 hours, and then into pure water for 24 hours. After such treatment 

 the spores were found to be light brown in colour, irregularly oval, 

 but varying in size and shape, and tuberculated or slightly spiny on 

 the surface. They were found to be thickened at one end, with usually 

 a small, but sometimes unusually long (fig. 5, Plate A) projection. 

 These projections apparently aid in keeping some spores of a series 

 together (fig. 5, Plate A). They measured 28 to 40X16 to 19 /■*. 

 Each spore appears to have two germ pores. 



{Such then are the characters of one stage of existence of a very 



