SOME NOVA SCOTIAN AQUATIC FUNGI. — MOORE. 



229 



long axis of the antheridial branch and applied by their apices 

 to the walls of the oogonium. 



This species appeared in material taken from the Columbus 

 Avenue swamp, Sydney, and from various other sources near 

 the same town. The irregularly thickened walls of the oogonia 

 and the antheridia are very characteristic. It is not of rare 

 occurence in cultures, but, in my experience, has not appeared 

 so frequently as the following well marked variety. 



A. racemosa var. stdlifjera Cornu (Fig. 15). This variety 

 differs from the type in that the walls of 

 the oogonia are more or less closely beset 

 with short, rounded outgrowths. The 

 number of oospores varies from 1 -7. Their 

 average diameter is, in my experience, 

 somewhat greater than in the type and the 

 antheridial branches appear to take their 

 origin more frequently from the walls of 

 the oogonia. As has been stated the 

 form appears to be more common than 

 the type in the districts from which col- 

 lections were made. 

 A. acadiensis sp. nov. (?). (Figs. 16-19). Hypha3 generally 

 very stout and long, fre(|uent]y exceeding lOO/i* in diameter and 

 attaining a length of 1.5°°^-. 



Zoosporangia almost cylindrical or somewhat fusiform, spar- 

 ingly developed, in some cultures rare. Oogonia terminal on 

 main filaments or on usually long lateral branches or inter- 

 calary. The oogonial walls are provided with inore or less 

 numerous blunt outgrowtlis, sometimes comparatively long, and 

 the terminal oogonia have, as a rule, strongly developed apiculi. 

 The oogonia, in older cultures, are produced in series, frequently 

 5-7 in a chain. The intercalary oogonia are barrel-shaped or 

 cylindrical. In addition to the outgrowths the walls of the 

 oogonia are also pitted. The oospores may reach 40 in an 



