G Brack. 
BRACHIOPOPA. 
Discinid^;. 
Biscina atlantica , King, 1251—1407 fath., IT.S. coast ; Verrill, p. 578. 
ObOLIDjE. 
Billingsia, n. g., near Obolella, but differing in the central pair of 
muscular impressions, and in the presence of a spoon -shaped cavity 
beneath the rostrum. For Obolella desiderata , Billings, Lower Silurian, 
Canada ; Ford (1). 
Elhania , u. n. for Billingsia , preocc. ; Ford (2). 
