BRA CHI OP OD A — TELOTREMA TA. 



327 



each side by 18 to 20 plications. Fold marked by a shallow sinus 

 in the median line. Whole surface finely striated longitudinally. 

 Hamilton of Iowa, Michigan, Nevada, Ontario. 



W 



FlG. 415. Spirifer 



(Pal. N. Y., IV.). 



FlG. 416. Spirifer fornacula (lnd. Geol. Survey). 



348. S. fornacula Hall. (Fig. 416.) Devonic. 



Pedicle valve subpyramidal with the elevation equalling nearly 



half the width, curving abruptly to the front and lateral margins; 



