.HKASSIC ('V('AI)S FROM WYOMINO. 1S7 



The largest specimen is No. 100. 204. weighing 2.1 kg., hut this is 

 supplemented by Xo. 500.507, weighing ().!)S kg., which nearly douhles 

 the area of surface exposed and shows th(> charactcM-s more cleai'ly than 

 any of the oi'iginal types. The specimen thus i-econstiiicted is a segment 

 from the side of a large trunk, probably near tiic base, and extending 

 <|uite to the middle. The diameter, which is still not complete, is 23 cm. 



Still more important was the discovery that the large fragment 

 No. 500.511, weighing 1.54 kg., forms part of the type specimen Xo. 

 500.38, and exactly matches the fractured face represented in pi. cii of 

 the first paper, completing the upper part. As a surplus of good foi- 

 tune it was also found that the smaller fragment Xo. 500.516, weighing 

 0.65 kg., fits both these specimens in such a manner as to extend the 

 part covered by its entire thickness of about 4 cm. This brings it within 

 5 cm. of the basal fracture, and we now have over two-thirds of the 

 trimk. 



One small specimen, Xo. 100.250, weighing 0.43 kg., was found to 

 belong to the type specimen Xo. 500.80, which was itself only a frag- 

 ment and w'as not figured. It now becomes a respectable specimen. 

 The other case of complementary parts is that of Xos. 100.289 and 

 100.292, which are both small specimens, weighing together only 0.23 

 kg. and showing nothing that is not better shown by other specimens. 



PI. XLIX is a view of the external surface shown iu the segment 

 Nos. 100.204 and 500.507. 



Cycadella nodosa Ward. 



Pi. L: PI. LI; PI. LII, Fig. 1. 



I'.iOO. Cycadella nodosa Ward: Proc. Wash. Acad. 8ci., Vol. I, p. 271: Twentieth 

 Ann. Rep. IT. S. Cieoi. Siirv., lS'.)S-99, Pt. II, j). 401, ])1. cxiii-exxii. 



Notwithstanding the small number of specimens in the later col- 

 lections referable to this species and the fact that none of them supple- 

 ment the original types, it has proved one of the most satisfactory of 

 the specific groups. This is due to the fact that it contains two com- 

 plete trunks that are quite as fine as any of the original types and two 

 others that are very nearly complete. 



X^o. 500.509 is a complete trunk weighing 1.65 kg. and closely resem- 

 bles the type Xo. 500.47, but is somewhat smaller. It has the con- 



