42 



Art. 8. — A. Kryshtofovich : 



the upper part, and show the base decided- 

 ly cuneate towards the short petiole. The 

 trne nature of this typical form is still some- 

 what problematical, though Gymnosperm in 

 any case. The plant now in question was 

 described originally as Phyllodadus (1. c.) by 

 Lesqueeeux who afterwards put it into the 

 genus Tlihmfeldia, whose systematic position 

 is also doubtful. Eecently Bekey, and after 

 him other authors, have put the same plant 

 in a new genus Protopliyllocladus, supposed 

 to be closely allied to Phyllodadus. 



The cladodies of Protophyllodadiis are 

 cuneate below and fan- shaped above, being 

 either dentate or dentate-fissed on edge. 

 The midrib disappears below the apex, while 

 the secondary veins are numerous but in- 

 distinct on account of the coriaceous con- 

 Fig. 6. sistence of lamina. The apex is usually 



Protophyllocladiis snbintegrifolius , , o t j i 



(Lesq.) beeet. obtuse. Some more dissected specimens of 



my collection, perhaps, are still more closely allied to P. lohatus 

 Bekey^^ from the Magothy and the Black Creek, but for tliis 

 identification I need more complete and numerous specimens, al- 

 though no essential difference in general appearance can be seen. 



The species, which is indeed a type fossil of Gyliakian in 

 Sakhalin, is considerably limited in its vertical distribution, being 

 abundantly represented in the lower part of the Upper Cretaceous 

 in North America, as in the Dakota Group of Kansas and Nebraska, 

 the Earitan Formation of New-Jersey and Magothy of Maryland 



1) Berey (1914), p. 17, pi. n, f. 9-13. 



