228 The Scottish Naturalist. 



years been familiar with an Entyloma in the leaves of R. repens, 

 from near Aberdeen, from Forfarshire, from Perthshire, and from 

 Forres, which agrees with the descriptions by Unger (" Exanthe- 

 mata'' 345), in all respects, besides being in the same food-plant 

 mentioned by him, but which is perfectly distinct from the 

 Entyloma in R. Eicaria. In the belief that they would prove to 

 be distinct species, I have examined carefully with the microscope 

 specimens of the two, and I find that they correspond entirely with 

 two described in Winter's " Pilze" in Rabenhorst's " Kryptogamen- 

 flora" as given below. 



EntyloHia Ungerianum De By. {Protomyces microspores 

 Unger), in the leaves of Ranunculus repens, less often in R. acris, 

 in deformed and conspicuous patches of the leaf. The patches 

 occupied by the fungus are 1-3 mm. wide, and become very convex 

 on one side, very concave on the other side of the leaf, and often 

 occur in large numbers on the leaf-blade, or, as described by Unger, 

 on the leaf-stalk. At first they are pale yellowish-green, but they 

 soon become gradually browner, and at last wither. The surface 

 of the spot never shows any sign of sporidia as in the form described 

 below from R. Eicaria. The spores are densely crowded in the 

 spots frequently ; they are irregularly marked with surface-ridges, 

 owing to unequal thickness of wall, are nearly globular or oval, 

 12-20 mk. in diameter, and in colour vary with age from nearly 

 colourless to pale brown. This species seems to be local, but far 

 from rare. 



Entylorna Ficariae, F. von Waldh. [Eusidium Ranunculi 

 Bon., Protomyces Eicarioz Cornu and Roze, Protomyces microsporus 

 Berk, (nee Unger). Entyloma Ungcrianum Cooke (nee De By.)], 

 in the leaves of Ranunculus Eicaria, causing flat pale spots about 

 1-3 mm. across, visible on both surfaces, but especially below, at 

 first pale green, then dirty white, with a whitish dust on the sur- 

 face, produced by the development of sporidia from the spores 

 while still in the leaf; after a time the spots become brown as they 

 begin to wither. The spores are rounded, or slightly polygonal, 

 from mutual pressure, and push out mycelium or conidiiferous 

 tubes very readily. They measure 8-12 mk. in diameter, and vary 

 with age from almost colourless to pale yellow-brown. Their wall 

 is almost uniform in thickness, and is thinner than in the last. I 

 have convinced myself by an examination of specimens of Cylindro- 

 sporium Eicaria} B. and Br.. No. 1458, in the exsiccati published 

 by Mr. Berkeley himself (No. 212), and by Dr. Cooke (exs. ii., 

 No. 172), that this supposed species is certainly nothing else 



