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MESOZOIC PLANTS OF NORTH CAROLINA. 117 



Trunk of cycad. 



Plate LII, Fig. 5. 

 Emmons's "Am. Geol.," p. 123, fig. 92a. 



" The scars of the fallen leaves are rhomboidal, and the center of each has a 

 rhomboidal pit. There is a tendency to striation immediately upon the border of each 

 scar." 



This is apparently a Zamiostrobus, and not the trunk of a cycad. It 

 might be called Zamiostrobus Emmonsi. Emmons says that he found in the 

 same bed cylindrical casts with a rough exterior, but no distinct marks of 

 fallen leaves, which were no doubt casts of the trunks of cycads. He does 

 not give the locality and horizon of these impressions. 



Lepidodendron. 

 Plate LIV, Fig. 10. 

 Emmons's "Am. Geol.," p. 124, fig. 93. 



" The cast of trunks bearing the external markings of this singular vegetable are 

 by no means common, but many smooth and rather striate stems, 7 to 8 inches in 

 diameter, are very common at House's Quarry, on Haw River. In one instance I 

 obtained a branch marked and scarred as in figure 9L Fig. 93 (Fig. 10 of this work) 

 was taken from the cast of a stem imbedded in the conglomerate of Lockville. The 

 stem was 6 or 8 inches long, and had a small branch proceeding from it." 



I omit Fig. 94, as it is too vague to show anything of the true nature 

 of the impression, which was evidently a Zamiostrobus, and possibly the 

 same with Z. Emmonsi. Emmons's fig. 93 (Fig. 10 of this work) might 

 represent a new species of Zamiostrobus but for the great length mentioned 

 above by Emmons, viz., 6 or 7 inches. 



These impressions are of course not those of Lepidodendron, as this 

 plant does not exist in the Mesozoic. 



Albertia latifolia 



Plate LII, Fig. 6. 

 Emmons's "Am. Geol.," p. 126, fig. 95 



"The leaves are thin and broad, scarcely striate, ovate, or obovate, and sub- 

 spatulate or narrowed at the base and apparently slightly decurrent. Separate leaves 

 of this plant are not uncommon in the beds at Lockville. The leaves are pressed 

 obliquely sometimes, and hence true forms may not be accurately preserved. Occurs 

 in the blue sandy slate or shale at Lockville." 



