DESCRll'TlON OF THE Sl'EClES. 1G7 



are generally very fragmentary an<l apparently injured by transport, it is 

 quite possible that the comparative rarity of cycatls is apparent rather 

 than real, being clue to the accidents of preservation, which were not 

 favorable to these plants. Although not ecpialing the ferns and conifers, 

 the cycads ai'e present with a development sufficient to form an important 

 element in the flora and to add greatly to the Mesozoic aspect of the 

 vegetation. 



AN0M0ZAMITP:S Scliimper. 



Leaves comparatively small, linear or ribbon shaped, sometimes (the 

 younger?) entire, mostly cut into irregular segments; lamina of the leaf 

 attached laterally, sometimes undivided or only partially divided, but 

 most often divided into rectangular lobes unequal in size, which, especially 

 in the lower ones, are rounded; nerves going off at right angles, simple, 

 and parallel. The segments have sometimes a corded border. 



This description, which is very nearly that given by Schimper' for 

 Anomozamites pi'oper, typified in Anomozamites inconstans Grippert, fits 

 exactly a few of the smaller Ti^niopteris-like cycads of the Potomac flora. 

 The forms thus limited range, according to Schimpei', from the Rha-tic to 

 the Wealden. From the genus proper, having the above description, 

 certain lai-ge leaves are excluded by Schimper in the work above quoted, 

 and placed in a subgenus, Platijpterigium. The.se will be noticed further 

 on. In the genus proper of Anomozamites there are two species in the 

 Potomac flora. 



Anomozamites angustifolius, sp. nov. 



Plate XXX, Figs. 2, 3. 



Leaves comparatively narrow, 4™' wide, ribbon-shaped at the tip, 

 narrowed rapidly ; leaf-substance thin, lower portions of leaf not seen ; 

 midnerve moderately strong; lateral nerves going off" nearly at right angles, 

 simple, parallel, arched slightly forward, towards the tip of the leaflet going 

 off more obliquely and arched forward more strongly, slender, but distinct. 



Localities : Fredericksburg ; Baltimore ; in Meek's collection ; rare. 



■ Zittel's Handbuch der Palseont., vol. 2, Lief. 2, p. 224. 



