[PENHALLOW] A REPORT ON FOSSIL PLANTS 311 
If the suggestion thus indicated may be relied upon, it would 
harmonize with the very general occurrence of representatives of the 
Urticaceæ in Cretaceous formations, such as Ulmus, Ficus, etc. The 
specimen might be referred provisionally to Dorstenia. 
1428 
mon UNDETERMINABLE, 
#  Several specimens under number show fragments of dichoto- 
mously branching remains which cannot be satisfactorily correlated with 
any known species. They strongly suggest a variety of well-known 
forms, including Hymenopteris, Czekanowskia, Baieropsis, Potamogeton 
and Naias, with none of which a satisfactory relation can be established ; 
and upon careful consideration and comparison, the conclusion has been 
reached that they represent the larger veins of exogenous leaves, possibly 
of the type of Platanus, which have become skeletonized and broken 
up, thus leaving the peculiar fragments observed. This conclusion will 
satisfactorily meet all requirements. 
SUMMARY AND GENERAL CONCLUSIONS. 
In summarizing the foregoing results it is hoped to answer more 
or less completely, several questions which have been raised as to the 
age of the deposits in which the fossils occur. The precise nature 
of these problems may be best understood by quoting from the original 
letters of transmittal and information, to the effect that “ Nos. 1428, 
1430, 1433 and 1436 were collected from a large area of what has 
always been known as Lower Cretaceous, occurring at the Boundary 
(49th Parallel) Line between the Pasayten and Skagit rivers. There 
seems to be at least 28,000 feet of this series altogether, and it appears 
to correlate with the Shasta-Chico Series. I am particularly anxious 
to know whether 1428 is older than 1430 in its facies, and still more 
to know whether both are really Cretaceous.” And later, in answer to 
questions as to the relative positions of 1428—1436 of the 1905 collec- 
tion, and 471 of the 1903 collection, the reply was that “ The locality 
of No. 471 is about one hundred and twenty miles east of that of 1428— 
1436;the former near to Rossland, the latter on the summit of the 
Cascade Mountains. The age of the Rossland volcanics and of the ash 
beds or sediments in which these obscure 471 specimens occur, is not 
at all understood, and I was hoping for some indication as to whether 
these rocks are even later than Palzozoic. The two occurrences are 
completely separate in geological and geographical relations, but there 
is no good reason why both should not be Cretaceous.” 
Sec. IV., 1907. 19, 
