THE 
AMERICAN GEOLOGIST. 
Vol. XVIII. AUGUST, 1896. No. 2. 
NOTE ON THE DISCOVERY OF A SESSILE 
CONULARIA. ARTICLE II. 
By R. RuEDEMANN, DolgeviUe, X. Y. 
(Plate II.) 
After having presented* the general features of the occur- 
rence of a sessile Conidaria, the writer intends now to de- 
scribe the most novel part of the fossil, i. e., the basal appen- 
dage. 
Though an attempt to isolate and decolor some of the appen- 
dages failed, partly on account of an obscure cleavage in the 
rock and partly on account of the consistency of the residuum 
after the treatment with acetic and hydrofluoric acids, the 
author succeeded at least in developing, by the application of 
the same agents, several of the stout chitinous appendages on 
the slabs (cf. figs. 5 and 1(3). The defects in the preparation 
of the material are atoned for by the well-preserved state of 
the material itself, for several of the bases are preserved in 
neat natural sections (cf. figs. 2 and 3), a comparative study 
of which — as well as of the varying aspects of the other bases 
— allows a fair insight into the structure of tliis interesting- 
organ. In order to enable the reader to form for himself a 
picture by a comparison of the difi^'erent states of j^reservation. 
the writer has given as many sketches as possible. 
*Amer. Gkol., vol. XVII, pp. 158, March, 189G. 
