A. decaturenais (3) 
mart iniana d'Orb. He does not speak of the bilateral symmetry 
of the calices hut both of his figures indicate such a condition, 
in each there are two opposite elongate seyjta that connect with 
each other through the columella* I take it then, that the 
calices of A* mart ini an a are bilaterally symmetrical with the 
septa grouped not very definitely in two's, three's, four's or 
f dive's on each side of the median plane. 
It seems probable that Act in acts may be intermediate in 
character between the families Ac r op or idae ( hadreporidae Auct . ) 
and Per it idae * These notes and suggestions are made in the 
hope that some one with the requisite material may make a more 
careful study cf the Cretaceous species of the genus to deter- 
mine its relations to those two families. 
