226 



SOME NOVA SCOTIAN AQUATIC FUNGI. MOORE. 



A. polyandra Hild. (Fig. 9). Hyphae robust and long, 

 frequently exceeding a centimetre in length. Sporangia some- 

 what spindle shaped, not very 

 abundant. Oogonia terminal 

 on rather long lateral branches 

 which are generally curved 

 and at times helically coiled, 

 or terminal on the main 

 filaments. Walls not much 

 thickened, smooth and un- 

 pitted, slightly brownish when 

 old. Oospores 1-20 in an 

 oogonium, commonly 8-12 ; 

 23-30/4 in diameter, centric. 

 Antheridial branches arising 

 from the oogonial branches or 

 from the main filaments near 

 them, generally more or less 

 branched. Antheridia usually 

 short clavate, several to each 

 oogonium. 



This species appeared on 

 materials collected from a 

 number of sources at Lower Mt. Thorn, Pictou county, and 

 appeared to be the most cjinmon of the Saprolegniacece in that 

 district. In young cultures the oogonia are spherical, but in old 

 cultures, when they are being abundantly developed, they 

 frequently become more or less irregular in shape-ovate or 

 obovate. This characteristic was constant in a large number 

 of cultures made. Not infrequently, too, an apiculus appeared 

 on an oogonium. This species appears to be very closely 

 related to the next, differing from it principally in the 

 smaller size and greater numbers of its oospores, in the more 

 branched character of the antheridial branches, and in the more 

 abundant productiDn of sporangia. In old cultures, as in 



