188 :\IKS()Z()T(" FTJIKAS OF rXITED STATES. 



tracted l):i.so oven more clearly marked. Xo. 100. 120(1 is also complete 

 and weighs 2.83 kg. It closely resembles the type Xo. 500.17. It is 

 nearly the same size as that specimen, but tlie rock is less compact and 

 thei'e is some difference in the weight. Xo. 100.217 lacks the summit 

 but shows the base very well. This was a larger trunk and still weighs 

 1.59 kg. Xo. 100.229 is a small, much flattened trunk, complete with 

 the exception of a small piece. It weighs 0.47 kg. Except in size it 

 is nearest to the type Xo. 500.21. The other two specimens are frag- 

 ments and their reference to this species is somewhat doubtful. 



PL L is a side view of No. 500.509 and PI. LI a side view of X'o. 

 100.206. PI. LII, Fig. 1, shows one of the flattened sides of Xo. 100.229. 



Cycadella cirrata Ward. 



Pi, LII, Figs. 2-4; PI. LIII. 



1000. Cycadella cirrafa Ward: Proc. Wash. Acad. Sci.. Vol. I, p. 272: Twentieth 

 Ann. Kep. U. S. Geo]. Suiv., l,S9S-99, Pt. 11. p. 40:^ pi. exxiii-cxxix. 



A large number of small fragments in the second and third invoices 

 show the peculiar internal structiu'e of this species, while there is nothing 

 in their general character that negatives their reference to it. There 

 are some others that seem to belong here, but which differ in the char- 

 acter of the rock and in other respects from any of the types. If com- 

 plete trunks of such had been found, it seems probable that they would 

 have represented one or two new species, but lacking adequate material 

 it seems best to refer them doubtfully to C. cirrata for the present. 

 Many of these fragments are found to i-epresent complementary parts 

 of one another, and a still larger number so closely resemble one another 

 in structure that there is scarcely any doubt that they are from the 

 same trunk that has disintegrated into small pieces. There seem to be 

 three or fotu' such trunks, and nearly all the fragments can be referred 

 to one or another of them. One of these trunks is undouljtedly the 

 one to which the type specimens probably all belong (see the discus- 

 sion following the description), but it has not been possible to find any 

 exactly complementary parts of the types. 



The Xos. 500.136, 100.240, and 100.223 all join togethei' in that 

 order, and Nos. 100.210 and 500.569 also join in such a manner as to 

 make it practically certain that they all belong to one trunk and that 



