The porifera and coelentera . ich correspond to the solenia in the platfonns of Tubipora; it, a tabula.(After Hickson.) are elongate, ranged side by side, and spring from a calcareous encrustingstolon- The proximal part of each zooid is stiffened to form a firmcalcareous calyx, the corallite, into which the distal part can be cavitj of each corallite is divided by transverse, calcareous jiartitionsof various form—tabulae. The individual zooids are united with one L THE ANTHOZOA another by horizontal, calcareous lamellae or platforms, springing fromthe levels of the tabulae and pe
The porifera and coelentera . ich correspond to the solenia in the platfonns of Tubipora; it, a tabula.(After Hickson.) are elongate, ranged side by side, and spring from a calcareous encrustingstolon- The proximal part of each zooid is stiffened to form a firmcalcareous calyx, the corallite, into which the distal part can be cavitj of each corallite is divided by transverse, calcareous jiartitionsof various form—tabulae. The individual zooids are united with one L THE ANTHOZOA another by horizontal, calcareous lamellae or platforms, springing fromthe levels of the tabulae and penetrated by branching solenia. Newzooids are formed by budding from the solenia of the 4. Favositidae. The colony is basaltiform, composed ofnumerous polygonal zooid tubes closely packed together. Tabulaepresent and the walls of adjacent zooid tubes communicate by — Favosites, Lamarck; Syringolites, Hinde ; Stenopora, 5. Columxariidae. This family of extinct corals, comprising 2. Fio. XI. 1.—Favosites gnthlandica, a colony about one-half natural size from the Upper Silurian. •J.—A portion of the same colony ma^nilied, showing the closely apposed eorallites and theperforations, solenia, placed at regular intervals on their walls, alternating with one another. 3.—Portion of a longitudinal section of FavosiUs (lOthUiudica, showing tlie tabulae, solenia,and the minute lacunae in the walls of the corallitfs. Magnitied. All the tigures original. the genus Columnaria (Goldfuss), may provisionally be placed among theAutothecalia. See Bourne (9). The fossil forms of the Autothecalia were at one time placed alongwith the Helioporidae and some Madroporarian corals in a group Tabulata,Hickson (42) has clearly demonstrated the relations of Tubipora toSyringopora, Syringolites, and Bourne has shown that Favosites must beranked with these forms rather than with the Helioporidae. There is agreat resemblance between the extinct Syringopora
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