311 L. F. Ward — Fossil Cycads in the Tale Museum. 



with the surrounding hard tissues, often projecting downward 

 below the armor, varying in size with the specimen. 



I have already mentioned the specimen No. 32, and the simi- 

 lar one No. 19 of the U. S. National Museum Collection, both 

 of which I took for immature forms of C. minnekahtensis. 

 The latest invoices contained 19 additional specimens so like 

 these as to render that theory no longer tenable, and I feel 

 entire confidence in erecting this large and very distinctive 

 group into a new species. In fact, notwithstanding the anom- 

 alous character of these forms and the consequent difficulty 

 in finding terms by which to describe them, there is scarcely a 

 species known to me that has less confusing relationships with 

 other species than has this one. Though truly protean, as I 

 have attempted to imply by the specific name chosen, none of 

 its many forms is at all the same as those of any other species. 



It now consists, as we have seen, of 21 specimens, 20 of 

 which are in the Yale collection. The numbers, with their 

 respective weights and state of preservation, are as follows : 



No. 32, 2'6l kilograms, complete. 



No. 185, 0-94 " nearly complete. 



No. 187, 0-14 " " 



No. 241, 1-59 " " 



No. 253, 1-02 " fragment. 



No. 296, 1'25 " nearly complete. 



No. 297, 0-34 " fragment. 



No. 303, 1-59 " nearly complete. 



No. 315, 0-91 " " 



No. 359, 1-81 " " 



No. 382, 1-25 " " 



No. 414, 3-52 " " 



No. 457, 1*47 " complete. 



No. 458, 1-47 " incomplete. 



No. 483, 0-56 " fragment. 



No. 466, 68 " incomplete. 



No. 487, 3 18 " nearly complete. 



No. 499, 0-68 " " * " 



No. 521, 0-79 " " " 



No. 529, 0-22 " " " 



No. 19, U. S. Nat. Mus., 1.81 kilograms, nearly complete. 



A careful study of all these specimens, and a reexamination 

 of No. 19 of the U. S. National Museum, have tended to 

 strengthen the impression which the last-named specimen, con- 

 sidered alone, made upon my mind, and which I noted at the 

 bottom of page 607 of my memoir on the Cretaceous Forma- 

 tion of the Black Hills, viz., that these small, gnarled, and 

 branching forms have a decidedly rootlike appearance, and 



