616 Transactions of the Society. 



seed it hardly looked like a Fusarium, but on a culture plate it 

 formed lax cushions ; the spores are three-septate and measure 

 20-25 X 4-5 fi. There is one difference between this species and 

 the type in that the sporophores are septate, otherwise Bonorden's 

 drawing exactly represents the habit of the fungus, and " sporophoris 

 continuis " may not be a constant character. 



There are two forms of Hyphomycetes that have puzzled me a 

 good deal. The first grew on a seed of Festuca pratensis, and from 

 the character of the hyphae and spores I have placed it in the 

 hitherto monotypic genus Langloisula of Ellis and Everhart. The 

 hyphae are much larger, the spores also are larger, more deeply 

 coloured, and not so pear-shaped as in the American species, L. 

 spinosa. I therefore consider it to be a distinct species, and have 

 named it L. macrospora (plate XIII. lig. o). I fear the genus, how- 

 ever, rests on too narrow a foundation of divergence from other forms, 

 and the species might have been included in AcremonieUa. The other 

 specimen has baffled all my attempts to place it under any recorded 

 genus. It is in form and habit something like a StempliyUum, and, 

 but for the lack of colour, I would have classed it under that genus. 

 There is only one genus recorded under the group Mucedineae-hyalo- 

 dictyeae, and it is entirely different in form from the fungus I have 

 been dealing with. I have been compelled to establish a new genus, 

 which I have named Stemphyliopsis g. n., to connect it with its 

 nearest ally among the Dematieae ; the species I have called hetero- 

 spora, plate XIII. fig. 4. The spores are exceedingly varied in form 

 and size, and are borne at the tips of short branches from the main 

 hyphae. They are warted when mature, and the whole plant remains 

 colourless after some weeks' culture. I succeeded in reproducing it 

 on a gelatin plate. I got the original specimens on turnip seed and 

 on clover seed. 



The Mucorineae are the sole representatives of the Phycomycetes 

 that have appeared in the germinating case, and Bhizopus nigricans 

 Ehrenb. most frequently of all. It grows on any kind of seed, 

 though on the whole it is partial to the grasses. It spreads very 

 quickly, and in time extends over the whole available space. I have 

 iound another form also with rootlets somewhat similar to those of 

 Bliizopus, which on that account I have included in the same genus. 

 The sporangiophores rise singly from the runner-like hyphae, and 

 near the top they form an umbel of four short branchlets, each of 

 which is terminated by a subglobose smooth sporangium. The tip 

 of the branchlet expands gradually into the subglobose columella, to 

 the base of which part of the sporangium wall remains attached after 

 the dispersal of the spores. The whole plant is entirely colourless ; 

 the spores are small, oblong, and blunt at the ends. From the mode 

 of branching I have named it Bhizopus umbellatus (plate XIII. fig. 5). 

 In one instance I found the mam sporangiophore terminate in a 

 sporangium with one side branchlet imperfectly developed ; all the 



