172 HABITATS OF THE MiCETOZOA. 



It is hoped that this list is sufficiently varied and extensive to 

 •warrant us in bringing the matter under the notice of those who 

 are interested in the Mycetozoa. 



It will be seen that some genera have been observed only on 

 wood, but these again could be farther grouped as to whether 

 they affect oak {Badhamia nitens. Berk.), elm and beech [LycogaJa 

 Jlavo-fusGum, Eost.), or Coniferse and chestnut {Crtbraria aurantiaca, 

 Schrad.). 



Other species are apparently limited to straw-heaps, such as 

 Badhamia ovispora, Kacib., and Physarum straminipes, List. 



Some few species seem indifferent to their environment, of which 

 one may specify Bidymium ejfusum, Link, and D. dijforme, Duby. 



Of the genus Trichia and its allies, Hemitriclda and OUgonema, 

 some species of which are very abundant, none have been found 

 by us to have inhabited any other substance than decayed wood. 

 If they are attached in the fruiting- stage to living moss which 

 may be growing on rotten stumps and branches, it is simply that 

 they have crept up to these positions to form their sporangia, 

 so that the spores may be more easily distributed. The only 

 exception is that of a small gathering recently obtained from 

 a straw heap at Chaul End, which exhibits characters intermediate 

 between those of Trichia and Perichmia. Its exact position is not 

 yet determined, and it will be expedient to await its rediscovery 

 before pronouncing definitely upon it. Sphagnum may be credited 

 with two species in Great Britain ; these are Badhamia lilacina, 

 Eost., Pilmoor, Yorks (Miss Gr. Lister), and Flitwick, Beds ; 

 Chondrioderma simplex, Schroeter, Perthshire (Miss G. liister), and 

 Merionethshire. 



The foregoing observations have reference only to what is known 

 to us of the habitats of the Mycetozoa in Great Britain. It will 

 be readily understood that in foreign countries vegetable refuse 

 would consist of the remains of such plants as are natives of these 

 countries or are cultivated in them. 



