190 HULL SCIENTIFIC AND FIELD NATURALISTS CLUB. 



preferred to Canada Balsam. The latter is used for Cribrarias, 

 as it preserves the plasmodic granules which distinguish 

 certain species. Cribrarias may be washed in xylol, but it 

 is generally possible in their case, and also with such forms 

 as Arcyria and Stemonitis, to blow away the spores before 

 commencing. The microscopist must remember that in 

 most cases sliding the cover glass about, as is so often 

 done with botanical sections to secure an absolutely central 

 position, will roll up the capillitium and quite spoil the 

 specimen. When he is interested in myxos he will not mind 

 being eccentric. 



The Guide to the Mycetozoa in the British Museum, which 

 costs threepence, will enable the student to identify his finds 

 without much difficulty. The "Monograph of the Mycetozoa" 

 can be consulted in the Free Library, and full accounts of all 

 later species will be found in the "Journal of Botany." 



The identifications of almost all the species listed here 

 have been confirmed or corrected by Mr. Lister, but for 

 whose infectious enthusiasm and generous assistance this 

 collection would never have been undertaken. 



EXOSPORE^E. 



CERATIOMYXACE.E. 



Ceratiomyxa raucida Schroet. 



On elder branches in a hedge, and on rotten logs in a stick heap, 

 Thorp Garth, Aldborough, Aug. S, 1903. Snake Hall, near North 

 Cave, on pine stumps, Aug. 29, 1903; Aug. 27, 1904. Hornsea, 

 plantations north of the Mere, May 28, 1904 ; Aug. 8, 1904. Burton 

 Constable, Aug. 31, 1904. Not a common species in Holderness, since 

 logs are seldom allowed to lie until they are rotten. 



ENDOSPORE>E. 



PHYSARACE.E. 



Baclhamia foliicola List. 



In abundance on dead hawthorn twigs in a dry ditch at Tansterne 

 fox cover, Aug. S, 1903 (Journal of Botany, vol. 42, p. 129). 



Badhamia utricularis Berk. 



On an oak post, Thorp Garth, Aldborough, Aug. 8, 1903. North 

 Cave, Aug. 29, 1903. 



