276 WARD 



No. 500.50, 2.55 kilograms. 



" 500.55, 1-70 

 " 500.60, 1.53 

 " 500.66, 2.33 " 



" 500.81, 0.68 " 



The large combination, therefore, has a total weight 8. 19 kilograms, 

 and Nos. 500.50 and 500.60 together weigh 4.08 kilograms. 



The specific name is not meant to imply that thei'e is anything ex- 

 ceptional in the ramentum of this species, although most of the speci- 

 mens have a well developed outer coating of it, but some of the frac- 

 tures afford fine examples and the detailed study of the generic 

 characters has chiefly been made on this species and C. kfioivl- 

 totiiana. 



CYCADELLA FERRUGINEA n. sp. 



Trunk small (iScm high, 9x22cm in diameter), ovoid, laterally 

 compressed, unbranched ; rock hard, rust-colored without, striped and 

 spotted with the same in the interior, of medium specific gravity ; 

 organs of the armor horizontal at the middle, descending below and 

 erect at the summit; leaf scars subelliptical, lomm wide, tjmm high; 

 leaf bases fine-grained, not porous nor punctate; walls 2-3mm thick, 

 soft, rust-colored, with a median groove; reproductive organs much 

 obscured, sometimes raised, elliptical, 15 x20mm in diameter, sur- 

 rounded by thin obscure involucral bract scars, the central portion 

 only clearly shown on the fractured surfaces, heterogeneous and much 

 altered by mineralization ; armor 2-3cm thick, irregularly j(;ined to 

 the axis; wood icm thick; cortical parenchyma 5mm thick; fibrous 

 zone 5mm thick, not clearly differentiated into rings, but longitudi- 

 nally striate, parallel to the axis of the trunk; medulla a thin slab 

 visible only on the narrow edge where it is icm thick, apparently 4- 

 5cm wide. 



This species includes the two fragments Nos. 500.51 and 500.74, 

 exactly alike in all their characters and certainly belonging to 

 the same trunk. The fracture in both cases is longitudinal in the 

 direction of the minor axis, starting in obliquely near the top and be- 

 coming vei'tical near the middle. In No. 500.51 this vertical direc- 

 tion continues to near the base and then runs out on the same side 

 it went in. In No. 500.74 it describes a sort of curve, cutting in to 

 near the center and out again at a still sharper angle long before it 

 reaches the base. The true base and summit are therefore lost in 

 both specimens. There is one point at which the two pieces proba- 

 bly are contiguous, though the surface of contact is not large enough 

 to demonstrate this. 



