BY G. I. PLAYFAIR. 161 



Botany, a third were obtained from Collector, and all other 

 localities together account for the remainder. 



It should be mentioned that numerous books and papers have 

 been consulted before committing these notes to paper, but as the 

 publications amount to nearly ninety, it would take up too much 

 space to record my indebtedness to individual authors. 



Genus D o c i d i u m Breb. 

 Doc. EXPANSJM, n.sp. (T.iii. f.3). 



Doc. minimum, curtum, crassum, 2J plo. longius quam latum, 

 tumore basali lato, depresso, semicellulis ad apices expansis, 

 apicibus rotundato-truncatis, angulis superioribus lato-rotundatis 

 dentibus nullis, membrana levissime punctata. 



Long. 72; lat. 29/x. 



Botany. 



For a Docidium this form is quite unique. 



Genus Pleurotaenium Niig. 

 Pl. mediolaeve, n.sp. (T.ii. f.lO). 



PI. magnum, valde elongatum, rectum, 1 2-20 plo. longius quam 

 latum; basi semicellulae leviter inflatae et supra, inflatione 

 mitiore nonmtnquam instructae; apices versus sensim sed distincte 

 attenuatae; apicibus truncatis, rugisl. denticulis 10-12(rarius 4-6) 

 intra marginem semper ornatis; sutura non prosiliente; membrana 

 crassa; usque ad medium inflationum basalium dense scrobiculata 

 (non granulata); scrobiculae trans quemque inflationem in serie 

 densiore ordinatae; membrana in medio frondis laevi (unde 

 nomen). 



Long. 410, 504, 516, 528, 660, 684; lat. 36, 30, 38, 33, 37, 31^. 



Auburn. 



PI. mediolaeve belongs to the group having straight sides, and 

 apices furnished only with rugre, not with pronounced tubercles, 

 such as the forms of PI. Ehrenhergii De Bary, PL crenulatitm 

 (Ehr.), see Roy and Bisset, Jap. Desm. f.l9, which come nearest 

 in size and appearance. Others are PI. Stuhlmanni (Hieron.) 

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