L. F. Ward — Fossil Cycads in the Yale Museum. 341 



low interior in one instance containing a collection of small 

 round bodies of doubtful nature ; armor 2-3 cm thick, somewhat 

 definitely joined to the axis ; woody zone 2-4 cm thick ; cortical 

 parenchyma l-2 cm thick, generally of a loose porous structure ; 

 fibrous zone l-2 cm thick in two rings, the outer thicker, dark, 

 hard, and fine grained, the inner thin (5-7 mm ), partitioned off 

 by medullary septa and bounded on both sides by scalloped 

 lines ; medulla 5x8 cm in diameter, of a coarse and soft structure. 

 This species embraces 7 specimens, the numbers of which, 

 with their weights and state of preservation, are as follows : 



No. 



254, 



1-02 



kilo 



grams, 



incomplete. 



No. 



282, 



3-42 





a 



nearly complete. 



No. 



287, 



3-86 





a 



a 



No. 



335, 



3-18 





u 



a 



No. 



342, 



1-25 





u 



incomplete. 



No. 



377, 



3-42 





a 



a 



No. 



378, 



2'61 





a 



a 



These all came from the original Minnekahta locality. 

 Their nearest affinities are with C. turrita, and they resemble 

 certain of the branches or turrets of that species, but are all 

 entire trunks and show no signs of branching. 



The specific name refers to the reticulate appearance pro- 

 duced by thin white walls that form a network over the surface. 



A side and top view of No. 342 are given on Plate TV. 

 This specimen shows the leading characters as clearly as any 

 example. 



Cycadeoidea minima n. sp. 



Trunks diminutive, the smallest known (6-1 2 cm high, 8-14 cm 

 in diameter, with a girth of 20-39 CEa ), ovoid or obovoid, eccen- 

 tric or oblique, sometimes vertically compressed or flattened at 

 the top, simple, with a terminal bud or corresponding depres- 

 sion, the base usually hollowed out, but sometimes downwardly 

 projecting ; rock generally soft and porous, reddish brown or 

 drab colored, of low specific gravity; organs of the armor hori- 

 zontal except near the summit; phyllotaxy traceable in several 

 specimens, the rows of scars from left to right making an angle 

 with the axis that varies from 30-50°, those from right to left 

 making an angle in all cases of 75° ; leaf scars subrhombic to 

 nearly rhombic, 15-20 mm wide, 7-9 mm high ; leaf bases nearly 

 filling the scars, sometimes rising above the walls, presenting a 

 rough, spongy appearance, often having a pair of large pits 

 near the center, and occasionally showing indistinct marginal 

 rows of bundle scars ; walls thin, often less than l mm , hard and 

 flinty, light colored or white, wrinkled, striate, or grooved on 



