382 SySTEMAJTIC PAlEOifTOLOGT 



preservation as good as coTild be desired, so that the question can- 

 not be definitely settied, but such examples, as that figured go a long 

 way toward proring that at least some of the forms referred to 

 jSageiopsis had stiongly decurrent leaves and a spiral phyllotasy. Similar 

 features are shown in some of the specimens of Nageiopsis angustifolia 

 and are indicated in the figures of this species on pi. Ixiii. 



Fourteen supposed species have been described from the Potomac 

 Group, aa additional one from the Kootanie, and Prof. Seward recog- 

 nizes a species in the English Wealden and doubtfully records a repre- 

 sehtative from the inferior Oolite of Yorkshire. The genus is also 

 possibly represented in the Xeocomian of Japan by specimens which 

 have been identified as Podozamites, but this is far from being demon- 

 strable. 



The Potomac forms, excluding those fragmentary species which 

 are not here recognized as related to Nageiopsis, fall naturally into 

 three species characterized respectively by the possession of very long, 

 linear leaves, very narrow lanceolate leaves, and ovate-lanceolate leaves. 



They are especially characteristic of the Patuxent formation, in fact 

 the bulk of the unequivocal material comes from the single locality at 

 Fredericksburg, .Ta. They evidently survived the close of the Patuxent, 

 however, characteristic specimens of Nageiopsis angustifolia occurring 

 in the lower beds at Federal Hill in Alaryland. Their presence elsewhere 

 in the Patapsco formation is probable, but the evidence is not wholly 

 satisfactory. 



Eegarding the botanic-al affinity of Nageiopsis Professor Fontaine 

 has repeatedly pointed out its striking resemblance to Podocarpus. 

 While admitting this resemblance both l!s'athorst and Seward have sug- 

 gested Araucaria for comparison.^ Although there is, for example, 

 considerable similarity between Nageiopsis zamioides and Araucaria 

 Bidwilli, where in the genus Araucaria is there an analogue of 

 Nageiopsis Jongifolia? In addition the Araucarieae have their leaves 

 much crowded and the phyUotaxy is spiral while in Nageiopsis the leaves 

 axe much more rem.ote and the evidence for a spiral phyllotaxy is not 



^TMs is probably tlie true affinity of Seward's Lower Oolite Xageiopsis. 



