Styiopiiora compress a var sub nodosa 
O-q ;;g 
in lobes or nodules. In other cases lateral branches may be 
arrested in development and form gibbosities on the surface. 
PI. , figs. represent several of these specimens. A 
study of the large suite of specimens reveals no sharp line of 
division between typical compressa and the specimens that are 
designated var. sub nodosa . The calices of sub nodosa will average 
smaller, about *7 mm., than in the typical form, but in this 
feature the two varieties overlap. 
Stylophora compressa var. grandinodosa nov* 
PI. , figs. 
This variety is separated from the preceding by an in- 
crease in the size of the nodules, the two specimens referred 
to it are represented by pi. , figs. 
