Fig. 152.—Syringopora, a fossil, showing autothecalous tubes (th), funnel-shaped tabulae (tab), and tubular cross-bars (t).
Fig. 153.—Clavularia (Hicksonia) viridis, with creeping stolon and transverse connecting tubes.
The principal families of the Stolonifera are:—
Fam. 1. Cornulariidae.—Without spicules; Cornularia, Lamarck, Mediterranean; Stereosoma, Hickson, Celebes.
Fam. 2. Clavulariidae.—Clavularia, Quoy and Gaimard; Sarcodictyon, Forbes, British; Sympodium, Ehrb.; Syringopora, Goldfuss, fossil.
Fam. 3. Tubiporidae.—Tubipora, Linnaeus, tropical shallow water.
Fam. 4. Favositidae.—Favosites, Lamarck; Syringolites, Hinde; Stenopora, King.
Order II. Coenothecalia.
This order contains the single genus and species Heliopora coerulea among recent corals, but was probably represented by a large number of genera and species in earlier periods.