182 MESOZOIC FLORAS OF UNITED STATES. 



standpoint of internal structure, I shall append to my notes on each 

 species a list of the numbers of specimens that I provisionally refer to it. 

 This may prove useful as a basis for such work, although I do not doubt 

 that the study of their internal structure will require many changes in the 

 classification. I therefore do this at the risk of having many errors — if 

 such they can iDe called — subsequently corrected, but as all references 

 must be regarded as provisional, and as the extremely fragmentary 

 character of the material makes certainty unattainable, I am sure that 

 due allowance will be made and that no one will attribute necessary 

 changes to carelessness on my part. 



Genus CYCADELLA Ward. 



1900. Cycadella Ward: Proc. Wash. Acad. Sci., Vol. I, p. 263, pi. xiv; Twentieth 

 Ann. Rep. U. S. Geol. Surv., 1898-99, Pt. II, p. .392, pi. Ixx. 



All the specimens of the two collections under consideration belong 

 to the genus Cycadella, and none of them certainly represent species not 

 already described. 



Cycadella Reedii Ward. 



PI. XLVII, Fig. 3. 



1900. Cycadella Reedii Ward: Proc. Wash. Acad. Sci., Vol. I, p. 264, pi. xv; Twen- 

 tieth Ann. Rep. U. S. Geol. Surv., 1898-99, Pt. II, p. 393, pi. ixxi-lxxvi. 



An unexpectedly large number of fragments had to be referred to 

 this species, most of them more or less doubtfully, l^at in all cases the 

 characters show a closer relationship to it than to any other described 

 species. They are mostl.y fragments and there is no complete trunk. 

 They represent small trunks, usually, so far as can be judged from the 

 parts we have, smaller than any of the original type specimens except 

 No. 500.10 (see pi. Ixxvi). They are generally from trunks larger than 

 that, but resemble it in other respects more than they do other types. They 

 show variations in the internal structure which may be specific, but as 

 all the type specimens previously described were so nearly complete and 

 the structure was not shown, it is not known what the interior would 

 reveal. There is, however, nothing in an}^ of the fragments referred to 

 this species that conflicts with the description given. 



PI. XLVII, Fig. 3, represents one side of the specimen No. 100.239, 

 which is a fragment weighing 0.47 kg., of which the top and the whole of 

 one side are wanting. 



