312 L. F. Ward — Fossil Cycads in the Yale Museum. 



the surface, sometimes with a visible commissure; reproduc- 

 tive organs few and obscure, small and inconspicuous, never 

 exceeding 3 cm in diameter, the bract scars very obccure and the 

 central portion mostly solid ; armor poorly exposed, 2-4 cm 

 thick, separated from the axis by a somewhat definite line ; 

 woody zone 2-3 cm thick ; cortical parenchyma l cm thick, trav- 

 ersed by the distinctly visible strands ; fibrous zone l-2 cm thick, 

 not differentiated, somewhat definitely bounded on both walls, 

 the outer often a scalloped surface, the inner marked by longi- 

 tudinal ridges forming narrowly rhombic meshes; medulla 

 2-5 cm in diameter, porous or spongy, homogeneous and struc- 

 tureless. 



This species embraces 15 specimens of the Tale collection 

 and one from that of the U. S. National Museum, which are the 

 smallest complete cycadean trunks known. The numbers, 

 weights, and state of preservation, are as follows ; 



No. 



53, 



1-57 



kilograms. 



, complete. 



No. 



149, 



1-22 



cc 



cc 



No. 



150, 



1-39 



a 



cc 



No. 



152, 



0-79 



cc 



a 



No. 



153, 



0-45 



cc 



cc 



No. 



154, 



0-45 



cc 



cc 



No. 



155, 



0-34 



cc 



cc 



No. 



156, 



0-30 



a 



cc 



No. 



157, 



0-23 



a 



nearly complete. 



NO: 



168, 



2-15 



cc 



complete. 



No. 



426, 



0-30 



cc 



fragment. 



No. 



468, 



0-45 



a 



nearly complete, 



No. 



474, 



0-45 



a 



incomplete. 



No. 



478, 



o-ii 



cc 



fragment. 



No. 



714, 



1-36 



cc 



complete. 



U. S. Nat. Mus. specimen, 0-62 kilograms, nearly complete. 



When I made my first study of the 87 specimens then in 

 the Yale collection, I found No. 53 of this group, and rather 

 than create a new species for it I doubtfully referred it to C. 

 McBridei, as previously stated. Mr. "Wells's next shipment, 

 which I studied in November, 1898, contained 9 specimens so- 

 much like it that I was then certain that they constituted a 

 specific group. The later accessions have added 5 others that 

 belong to the same group. 



In October of that year, when in the field with Mr. Wells, 

 I picked up a small perfect specimen in the region southeast 

 of Minnekahta station, and on account of its diminutive size I 

 brought it back with me to Washington in my valise. It also 

 belongs in this group. It now bears the number 2248 of the 

 locality catalogue of fossil plants of the U. S. Geological Sur- 



