On the Cretaceous Flora of Russian Sakhalin. 57 



FoNT,'^ and Hedercephyllum cmcjulatuin Font.'^ All those species 

 must, according to Beery,'^ be united into the single species A. 

 magnifollum Font. The most important coincidence of the Potomac 

 and Sakhalin leaves is the strictly contracted median lobe and the 

 broadly cordate form of the base of the limb. But the entire 

 absence of additional lobes and the more outwardly stretched 

 lateral lobes, in contrast to the upward ones of the American 

 species, are the characteristic differences. Amlia grœnlandica Heer,"^ 

 represented in Atane and in Dakota, appears not so closely allied 

 to our species, but a leaf impression described from Dakota as 

 Lindera venusta LesqP shows a great resemblance to ours, difforinf^ 

 only in having lateral nerves and lobes running more strictly 

 upward. May it not be regarded as a synonym of A. magnifolia 

 Font. ? From the above mentioned, our species seems to be good 

 enough to be separated under the new name, A. Polevoil m. 



A greater part of tlie collection of the Mgach flora consists of 

 its leaves, which is therefore one of the most important type fossil 

 of the Gyliakian. 



Besides A. groenlandlca, A. Eavniana He."^ was recorded from 

 the Atane and A. waigathensis Hr. from the Patoot'^ Beds, both 

 being far distant from our Sakhalin type. 



31. Ar alia TikhonovlcJiii n. sp. 



Locality : The sea coast at Mgach. 



Leaves palmately decompound, with five leaflets ; leaflets 6,0 cm. 

 to 10.0 cm. in length, and L5 cm. to 2.0 cm. in width, shortly 



1) Fontaine (1889), p. 321, pi. CLXXHI, f. 8. 



2) Fontaine (1889), p. 32i, pi. CLXII, f. 1. 



3) Beeey (1911 c), p. 491, pi. XCVI, f. 1-5. 



i) Heee (1882j, p. 84, pi. XXXVm, f. 3 ; XXXIX, f. 1 ; XLVI, f. 16, 17. 



5) Lesqtjeeetjs (1892), p. 95, pi. XVI, f. 1, 2. 



6) Heeb (1882), p. 84, pi. XXXVHI, f. 1, 2. 



7) Heer (1883), p. E6, pi. LX, f. 5. 



