﻿Fig. 44. — Cycadcoidea ingens (T. 208). 

 Large columnar silicified trunk from the northern end of the Cycad Valley, Black Hills Rim, East of Piedmont, South 

 Dakota. Collected from in situ position illustrated by lower photograph of Plate XLIX. Height, inclusive of 

 segment (S), 87 cm. Weight, 139.6 kg. Remarkable for naturally polished transverse sections of prefoliate 

 adventitious fronds with microscopic structure preserved. Position of fronds indicated by Nos. 2-6. The fronds at 3, 

 5, and 6 are further illustrated by figure 5 1 , and by photographs 6, 7, 8, respectively, of Plate XIX. For the dimen- 

 sions and number of pinnules of these several leaves see tabic at the bottom of page 95. 



