SPORE FORMATION IN UROCYSTIS. 
Dr. Farlow, in his recent account of the “ Onion Smut ” of the 
United States, gives his experience of the formation of the 
spores in the supposed new species Urocystis Cepulce. He says 
that there first appears on the mycelium a small lateral swelling of 
the hyplia, which divides by a partition at right angles to the 
length of the hypha into two cells, or else, as is not unfrequently 
the case, the two cells arise from the hypha simultaneously, and 
close to one another. Of the two cells which thus arise, one 
enlarges so as 'to become nearly spherical; whilst the other elon- 
gates into a worm-like body which bends over the surface of the 
other cell. In a short time the worm-like thread is divided into a 
number of cells by partitions at right angles to its length. The 
cells into which the worm-like body is thus divided, then bud out 
at the sides, and grow down in a winding manner so as to cover 
the original globular cell. By subsequent division of these wind- 
ing cells the accessory spores are formed. Tliis process in its 
initial stage reminds one of what takes place in Podosphocra. 
There is here, however, nothing like a conjugation, and the worm- 
like body can in no sense be considered a pollinidium. In Urocystis 
Cepulce^ at any rate, the theory that the accessory spores are 
formed by the indefinite interlacing of the hyphre around the 
globular cell is not true. They arise from a single, definite, 
worm-like thread. 
Professor Fischer de Waldheim describes the formation of the 
spores in Urocystis in conformity with the observations of MM. 
Winter and AYolff, which is not precisely the same. He says, 
“ Les branches du mycele se transforment en filaments sporo- 
genes ; en se toadant en spirales et devenant gelatineuses ; 
d’autres branches s’avancent vers les spirales, les entourent 
ou confluent avec elles, en devenant egalement gelatineuses et pro- 
duisant des glomerules. Chaque glomerule est compose de spores 
(centrales ou vraies), et de cellules peripheriques. Les branches 
en spirales produisent les spores ; les autres, a I’entour, — les 
cellules peripheriques.” 
MYCOGRAPHIA. 
The publication of the 4th part has been unexpectedly and un- 
avoidably delayed for some time beyond the period when it should 
have appeared. It is now in the binder’s hands, and will be 
issued simultaneously with the present number of this Journal. 
As on previous occasions, it contains twenty coloured plates, with 
the descriptive letter-press, illustrating the Cupulares section of 
the genus Peziza. The following part it is proposed to issue in 
the autumn, and will contain the remainder of the pileate species, 
such as Morchellay Gyromitra, Ildvella, SpatJiularia, &c. 
