sept. i9io.i FUJIL-SOME REMARKS ON THE CRET. FLORA ETC. 199 



we have proved (Stopes and Fujii, 1910; Suzuki, 1910) that 

 Cunninghamiostrobus and Cryptomeriopsis existed side by side; 

 and in Cryptomeriopsis we see much greater development of 

 transfusion tissue than in the living member Cryptomeria, a 

 fact which may be probably taken as an indication of an old 

 character. Living Cunningham ia shows also relatively strong 

 development of transfusion tissue in the leaf. Suzuki (1910) in 

 his present study found a new type of secondary phloem in 

 Cryptomeriopsis, which differs from the usual type of phloem 

 structure of living Taxodiina? or Cuppressineas, and also from that 

 of Sciadopitys verticillata, a plant representing a monotypic 

 genus, whose phloem structure as far as I have examined shows 

 some approach to the Abietineous type. These points should 

 be better considered in addition, together with other anatomi- 

 cal, morphological, and cytological characters in the treatment 

 of taxonomy and phylogeny of these groups. 



As to the phylogenetic derivation of the simple structure 

 of the secondary phloem of Cryptomeriopsis (Suzuki. 1. c p. 

 187), it is a question whether it has been derived by the sup- 

 pression of the development of phloem-parenchyma in the soft 

 zone of the phloem, thus from an ancestral plant which had a 

 phloem structure similar to that found in the present Taxodiinas 

 and Cupressineae in general, or by a new differentiation of a 

 regular bast fibre zones alternating with the double layers of 

 sieve-tubes from a simpler or undifferentiated conditions of an 

 ancestral plant. It may be easier to derive such a structure in 

 question by the simple suppression of an already existing ele- 

 ments of phloem parenchyma ; but it seems to me that the latter 

 alternative is nearer to truth. 



Concerning the pine groups of the Cretaceous, our knowledge 

 has been greatly extended by the very important discovery of 

 Prepinus statenensis by Jeffrey which showed the development 

 of a large amount of centripetal wood in the leaf bundle, and 

 of several species of true pines by the same author, and by the 

 interesting discovery of Prepinus japonicus and Pinus yezoensis 

 by Stopes and Kershaw. With respect to the interpretation 



