140 G, R. Wieland — American Fossil Cyoads. 



Fig. 2. 



Fig. 2. Longitudinal section of Cycadeoidean testas at point two- fifths of 

 distance from base to apex, x 110. 



A, and B. — Bennettites Gibsonianus (type). Two seeds from one and the 

 same cone. Lower Greensand, Isle of Wight. 



C. — Ci/cadeoidea sp. (not C. Wielandi). Wealden equivalents (Lakota) of 

 the Black Hills. 



D. — Bennettites Morierei (Sap. et Mar.). The type from Oxfordian or more 

 likely Lower Cretaceous (cf . Lignier) of Calvados. Normandy. Cf. Fig. SB. 



i, indurated layer arising from c of 



fig- 1; 



p, the outer fleshy or "blow off" 



layer arising from A of fig. 1 and 



expanding into five or six alse near 



apex, sometimes forming horns ; 

 /, collapsed tissue of inner flesh ; 



* Between the inner flesh (/) in various American seeds, and the nucellar 

 sack («), as well as in the seed of Bennettites Gibsonianus (B) often occur 

 loosely compacted large cells, supposed to be nucellar contents (pre- 

 embryonal tissues). In the initial course of silicification collapse of the 



t, tubular cells forming lax or frayed 

 husk, whence these cells may or 

 may not appear in the longitudinal 

 section ;=t, fig. 1. 



n, the nucellar sack tissue, always 

 quite susceptible to silicification.* 



