Addenda. 



221 



figured by Hartig in a paper translated from the 

 Botariisclte Zeitimg itl Annales des Sc. Naturelles, ser. 

 iv., vol. vi.j and especially tlie very curious form re- 

 presented in fig. 7, i., ii. Mixed with these were 

 abundant globose pale umber bodies, which we sup- 

 posed to belong to a species of Protomyces, but as they 

 were without any trace of mycelium or connection 

 with hyphse we felt rather doubtful. However, a 

 fortunate thin slice brought into view abundant my- 

 celium, with infant sporangia, besides others which 

 were perfect and connected still with the fertile 

 threads. A comparison of our figure (fig. 63) with 

 those of De Bary in Beitrage, No. 1, 1804, will at 

 once show that we have before us an allied production 

 for which we propose the name oi Protomyces concomU 

 tans. Our figure represents dark spores quite free, 

 and others still adhering to the fertile threads, besides 

 abundant mycelium passing beyond the cellular tissue, 

 and sometioaes immediately under the true cuticle. In 

 one spore there is a distinct margin. (Berk.) 



Excluded Species. 



Peronospora exigua, W. Sm. = Ovularia. 

 Peronospora ellii>Hca, W. ^TC\. = Ovularia, 

 Peronosjyora interstitialis, B. & Br. = 0vular'ia. 

 Peronospora ruiihasis, B. & Bv. = Ovular ia. 

 PeronosjJora ohliqiui, C^e. = Ovularia, 



