O. A. Derby—Flewibility of Ttacolumite. 203. 
the least, no support, but rather are deemed by one competent — 
to judge, to be decidedly adverse to what is bere claimed. 
he paleontological contradiction shown in the plants and 
animals of the Fairplay beds is not unknown to American geol- 
ogy, as every one is aware, but I do not know that it has been 
pointed out in this country at this horizon or in this direction—- 
the discordance appearing later in time, and the plants indicat- 
ing a younger and not an earlier age than the animals. An 
exactly parallel case appears to be shown in Eastern Russia, for 
in discussing the poorer strata of Kargalinsk, which he refers. 
to the Permian, Twelvetrees says, ‘as regards the flora [11 
species] the list has a Paleozoic aspect, but a secondary one as. 
respects the reptilian remains”’ [4 species cited].* 
Exploration of the locality will continue, and it is hoped that 
future material may throw more light upon the question. It 
may, however, be added that the few other insects found appear 
to have no Paleozoic relations whatever. 
Art. XXVI—On the Flexibility of Itacolumite; by ORVILLE 
A. DERBY. 
* Quart. Journ. Geol, Soc. Lond., xxxviii, 495. 
