sept. i9io.] SUZUKI.— ON THE STRUCTURE AND AFFINITIES 185 



ring and the large roundish pits on the lateral walls of ray 

 cells, this fossil specimen differs from Abies, where normal resin 

 canals may appear in the first annual ring only (Jeffrey 4). 

 Unfortunately, as the pith of the fossil stem is very poorly 

 preserved, we can not know whether the fossil has the sclerotic 

 diaphragms in the pith characteristic to Abies. Moreover, we 

 are entirely ignorant of the leaves and fructifications, so that we 

 cannot make any further attempt than associating this fossil 

 with Abies. 



Thus I have named this fossil Abiocaulis yezoensis from 

 the name of the locality Hokkaido (Yezo). 



Diagnosis : — 



Abiocaulis yezoensis gen. et sp. no v. 



Primary cortex with many large stone cells, large resin 

 reservoirs and mucilage cells like those of Abies. Periderm 

 development in the primary cortex. Secondary wood, without 

 normal resin canals except in the second annual ring, with 

 traumatic resin canals and few resin cells. Tracheids with 

 usually a single row of bordered pits, sometimes double rows 

 and then opposite. Medullary rays, generally one cell broad, 

 1-12 cells in height. Ray cells without serration on their walls, 

 the pitting of ray cells like that of Abies, and also large and 

 roundish like that of Pinus. Wood endarch. 

 Locality:— Upper Cretaceous, Hokkaido, Japan. 



Cryptomeriopsis* mesozoica. 



(Text-figure 1. Photos 3—5, Plate VIL). 



Of this plant (Text-fig. 1), we have a few pieces of the axes 

 (the largest, 8 mm. in diameter) and a few leafy twigs (the 

 smallest, ca 1 mm. in diameter). All these are found separately 

 in the fragments of nodules from Yubari and Ikushumbets, 

 Hokkaido ; but they seem to belong to the same species, 

 though there are some histological differences due to various 

 stages of development among them. 



* Stopes and Fujti 11. 



