A New Saprophytic Species of Lagenidium, with Notes on other Forms

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Abstract
A new species of Lagenidium is described as L. giganteum. It is a facultative parasite on mosquito larvae, Daphne, and cope-pods. The development of the sporangia is described. Sexual reproduction was not observed. It is also saprophytic, being culturable on a variety of nutrient agars. Soon after the fungus was isolated on agar a mutation occurred. The mutant can be recognized by the more irregular growth, thicker hyphae, and fewer septations. Both the mutant and the original strain have been kept in culture for over a year. This fungus probably represents a connecting link between the non-filamentous Phycomycetes and the filamentous forms. Lagenidium Closterii, L. Marchalianum, L. Oedogonii and L. brachystomum are described from America for the first time. A doubtful species of Lagenidium also is described.

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