On the Cretaceous Flora of Knssiau Sakhalin. 



51 



1906. 



23. Populus cf. potoniacensls M'ard. 



1895. Fopulus jMtomncaisis, Ward, 15th Ann. Report U. S. Geol. Surv., p. 

 pi. IN. f. 1-3. 



Fopulus aunculata, ibidem, p. 356, pi. IV, f. 4. 



Fojmlus iMotTmccmis, AYakd, in Fontaine, Monogr. Ü. S. Geol. Surv., 

 vol. XL VIII, (1905), p. 500. 



F. auric.ulata, ibidem, p. 499, i3l. CX, f. 5. 



P. menisj^ennoides, ibidem, p. 498, pi. CX, f. 2 (non 3, 4). 



1911. P. potomacensis, Berry, Lower Cretaceous, p. 458, pi. LXXXI, f. 1-le. 



Locality : Erikson's coal mine ; the Pilenga Pass. 



Among our collections, we observe together with remains of 

 ferns, small leaf impressions with a tender consistence, orbicular 

 or ovate in outline and cordate at the base. The margin of the 

 leaves is slightly crenulate. Our leaf may be compared with 

 Popidus potomacensis Ward from the Patapsco Formation. 



This species seems to extend in Russian Sakhalin from the 

 lower Series into the Gyliakian. 



24. Coeculus affi extlnctus Velexovsky. 



1887. Veeexovsky, Die Flora der böhmischen 

 Kreideformation, 4. Theil, p. 3, pi. VI 

 (XXXIX), fig. 1, 3. 



Locality : Sea-shore at jNIgach. 



To this species, recorded orginally from 

 the Cenomanian of Bohemia, some leaves 

 are very closely allied, about 6 cm. in length 

 and 3 J cm. in width, ovate in outline and 

 Fig. 8. showing thin basal nerves. Ficus ovatifoUa 



C0CCIÜ.1S aiî. extinctns Velen. Beriiy,'^ wMch is also simüar in general 



1) Beeey (1911), p. 123, pi. XII, f. 3. 



