254 Journal of Applied Microscopy. 



lular, endophytic fungus nearly allied to Fythiutn. The sexual organs are borne 

 upon a median ridge on the upper surface of the prothallium. The antheridia 

 resemble those of Eusporangiate Pteridophytes in general, while the archegonia 

 show an approach to those of the Leptosporangiate Filicineae. Though the 

 young embryo passes through an octant stage, its primary organs, on account of 

 their late appearance, can not be assigned to definite quadrants of the segmented 

 oospore. The gametophyte does not end its existence with the production of a 

 sporophyte, but persists for a long time, even for several years. The only gap 

 in the life history which now remains to be filled is that between the three-celled, 

 chlorophyll-bearing prothallia, obtained by Prof. Campbell, and the mature, 

 saprophytic form now so accurately described and figured by Prof. Jeffrey. 

 Chicago. W. R. Smith. 



Ellis, W. G. P. A method of obtaining mate- ^ supply of smutted barley may be 

 rial for illustrating smut in Barley. Ann. obtained by sowing soaked, skinned 

 * ^ ^ ^ ■ barley that has been plentifully covered 



by Ustilago spores. Stages in development of spores may be easily traced in 

 such material. Freehand sections of ears about three-eighths of an inch long 

 give a fair view of the mycelium and spore clusters. If more accurate study is 

 desired, they may be removed and fixed in Flemming's or von Rath's solution. If 

 smutted ears be removed and kept floating on water, the spores continue to 

 develop and very often germinate. 



It will pay teachers to remember this, for old and dry material is always more 

 or less unsatisfactory to work with. c. j. c. 



Errara, L. Structure of the yeast cell. Ann. The principal conclusions are as fol- 

 Bot. 12: 567-568, 1898. lo^s : " (1) A relatively large nuclear 



body exists in each adult cell. (2) Young cells contain no such body ; a little 

 later the old nuclear body divides, and one of its two daughters wanders through 

 the narrow connecting channel into the young cell. (3) After division is com- 

 plete, the two cells are still kept together by a mucilaginous, neck-shaped pedi- 

 cel, which may or may not persist, thus explaining the occurrence of cell chains 

 or isolated cells in different races of yeast." c. j. c. 



RECENT LITERATURE. 



Abel, R. Ueber einfache Hiilfsmittel zur Aus- Lang, W. H. Alternation of generations in the 

 fiihrung bacteriologischer Untersuchungen Archegoniatas. Ann. Bot. 12: 583-592, 1898. 



) A t!' tf'^i^l ^'^''''" ^' PP' ^""^^'S Lind, K. Ueber Eindringen von Pilzen in Kalk- 



(A btuDer), i»9». gesteine und Knochen. Jahrb. f. wiss. Bot. 



Bowhill, T. Manual of bacteriological tech- 32 : 603-634, 1898. 



nique and special bacteriology. 296 pp. 100 Qltmanns Fr 7ur EntwickelunPSffeschichte 



orig. illus. London (Olliver & B.), 1898. ^'derFToride;n %ot St. ^r9?f40 4 pt 



Goebel, K. Organographie der Pflanzen, ins- 1898. 



besondere der Archegoniaten und Samen- p^ ^ '^ ^ Anatomy of the seedling 



pflanzen. Zweiter theil : Specielle Organo- ^^ j^^^^^.^ spectabilis. Ann. Bot. 12: 475 



graphie. L Heft : Bryophyten. 8vo. pp. 283- ^ J ^g ^ g ^''= 



385. figs. 131-359- Jena: Gustav Fischer, t^/ i- / » y 



1898. M. 3.80. Wisselingh, C. van. Ueber den Nucleolus von 



„,„.,, ,. c r> 4.- A Spirogyra. Ein Beitrag zur Kentniss der 



HartOK. M. Alternation of Generations. Ann. ^^ °/. -o ^ rr -^ ct.. , /: t 



' *',« o o Karyokmese. Bot. Zeit. 56: 195-226. pi. 10. 



Bot. 12:593-594, 1898. jg^g> y^ ^ 



Klebs, Geo. Alternation of generations in the 

 Thallophytes. Ann. Bot. 12: 570-583, 1898. 



