10 (/) Corallum encrusting, rarely producing short, stubby branches; inner edges of septa dentate; corallites directly 



adjacent (Fig. 12) Astrangia aslreiformis 



Figure 12. — Astrangia astreiformis: an average-sized 

 colony encrusting a rocli. Scale: 2 cm. 



10 (/) Corallum branching, arborescent; inner edges of septa smooth; corallites not directly adjacent 11 



1 1 (10) Colonies uniplanar, with calices arranged on only one side; each calice bordered proximally by a rostrum 



(hood) (Fig. 1 3 A, B) Enallopsaminia rosirata 



Figure M.—EnaUopsammia roslrala: A, a branch from pan of a larger colo- 

 ny; note triangular swellings (rostra) beneath each calice. Scale: 2 cm. B, en- 

 largement of rostrum of one calice. Scale: 3 mm. 



1 1 (10) Colonies bushy, with calices randomly arranged on branches; no calicular rostra 



7 



