618 Transactions of the Society. 



Rhizopus umbellatus sp. n., plate XIII. fig. 5. 



Spreading hyphse with sucker-like roots, delicate, about 8-10 fi in 

 width ; sporangiophores rising singly from the runner-like hyphae uj> 

 to 500 li in length, and branching above in an umbellate manner ; 

 secondary branches usually four, sometimes septate, slightly wider at 

 the top, and terminated by a subglobose sporangium 50 x 60 /x : 

 sporangium-wall delicate, attached to the base of the columella ; 

 columella globose, 30 li in diameter ; spores minute, oblong, blunt, 

 5 x 2 fji. The whole plant colourless. 



On a seed of red clover in the germinating case, entangled with 

 Mucor erectus. 



The two other fungi that I have included in this paper are new to 

 Britain. Mucor spinosus Van Tiegh. (plate XIII. fig. 8) grew on a 

 cherry leaf in the spring of this year, when I was keeping the leaf 

 moist in order to develop some other fungi I observed on it. This Mucor 

 is distinguished only by the spinous processes at the top of the colu- 

 mella, which seem to have the effect of keeping at least some of the 

 spores attached, to the columella after the sporangium has burst ; it 

 differs from Van Tieghem's description in the appearance of the 

 mature spores, which are minutely warted. The other is a member of 

 the Nectrioidese. I found it at Llanvmawddwy, in North Wales, in 

 August 1900. The clear glistening perithecia were studded all over 

 a dry and blackened agaric, and looked like glandular hairs. They 

 proved on examination to be perithecia, and I believe it to be Sphxro- 

 nemella oxyspora Sacc. (plate XIII. tig. 9). The only previous records 

 of this fundus are from America, and it was named and rather 

 shortly described by Berkeley as Sphseronema oxyspora. Saccardo 

 placed it in the genus Sphseronemella, and queried it as perhaps an 

 Ascomycete, Eleutheromyces. The specimen from AYales proves the 

 correctness of the original determination, and there can be little 

 doubt that we are dealing with the same plant, though the distri- 

 bution is a little peculiar. The spores are colourless and measure up 

 to 7 li in length ; the appendages measure about 3 li. They are a 

 little larger than the ascospores of Eleutheromyces. 



►Specimens and slides of the fungi have been placed in the herba- 

 rium of the British Museum. ( Iromwell Boad. 



