bluntly 3-lobed at the apex ; the middle lobe the largest ; 

 inner corona-lobes 7 mm. long, 3 mm. broad, obovate, flattened 

 and appearing to stand at right angles to the outer lobes, on 

 either edge produced into a beak ; the inner beak longer than 

 the outer and recurved over the flattened portion of the 

 corona ; the outer beak entire or irregularly 2-3-lobed. 



Plate 72. — Fig. 1, corona ; Fig. 2, lobe of inner corona ; Fig. 3, lobe of 

 outer corona. 



F.P.S.A., 1922. 



