458 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 51. 



quently been found to be more or less abundant at other localities in 

 southern Sweden (Bjuf, Hoganas, Bosharp, Bornholm) and has also 

 been found in other widely separated parts of the world, including 

 north Persia, Tonkin, China, Mongolia, Oregon, and now Alaska. 



The specimen her'e figured is the basal portion of a leaf of some 

 magnitude and is chiefly remarkable for the exceedingly thick petiole. 

 Tliis is stronger than is usually sho^^^l in this species, though occa- 

 sionally it may reach nearly or quite this size, as may be seen in one 

 of the specimens figured by Zeiller in his Tonkin flora (pi. 49, fig. 6). 

 The size and angle of insertion of the leaflets is also the same as in 

 the figure just referred to. 



The specimen under consideration agrees very well with some of 

 the figures given by Nathorst in his Bjuf flora (pi. 15, figs. 8, 10, etc.), 

 except that the leaflets in the Swedish specimens are more nearly at 

 right angles with the petiole than in ours, but the difference is of 

 minor importance. 



Tliis form was noted by MoUer ^ from Bornholm, but as it was a 

 mere fragment its reference is questioned. The figure given of it 

 shows it to have shorter and much more acute leaflets than is usual, 

 and its reference may well be questioned. 



Under this name Fontaine has figured a number of fine leaves from 

 Douglas County, Oregon, but they have the leaflets broader, closer 

 together, and at a less angle of insertion than the majority of speci- 

 mens figured by Nathorst, Zeiller, and others from the Old World, 

 but these variations are perhaps well within the limits of specific 

 differentiation. 



Occurrence. — 6698. Upper Matanusha Valley, Alaska, about f mUe 

 up the next to the lowest creek entering the East Fork of Boulder 

 Creek from the south. 



CTENOPHYLLUM ANGllSTIFOLIUM? Fontaine. 



Plate 80, fig. 2. 



Ctenophyllum angustifolium Fontaine in Ward, Status Mesozoic floras of the 

 United States, U. S. Geol. Survey Monog. 50, 1905, p. 105, pi. 22. 



This specimen is referred with some hesitation to Fontaine's 

 species, which has heretofore been known only from the Jurassic of 

 Douglas County, Oregon. It is very much smaller than many of the 

 examples figured by Fontaine and should perhaps be described as 

 nev/, but it is so fragmentary that the full lengths of the leaflets can 

 not be determined with certainty. So far as can be made out it 

 might v\'ell enough be either a small leaf of this species or the upper 

 portion of a leaf of medium size, yet considering the differences it 

 has been thought best to question the reference. 



1 ;M611er, H., Bidrag till Bornholms loss, flora, Gymnospermer, Kongl. Svenska Vetenskaps-Ak. Handl., 

 vol. 36, 1903, p. 19, pi. 3, fig. 11. 



