Catalogue of lithophytes or stony corals in the collection of the British Museum . rtila-ginous short. 40. KEEATOISIS. Polypidom branched; axis of the stem and branches consistingof nodes and internodes, the former stony, the latter horny; thestony joints vary from ^ to 1 inch in length ; the branches rise fromthe stony nodes, are not numerous, and present rather a straggling-appearance. The axis is covered with a barky layer, around whichthe polypes arise; this layer is studded over with numerous largefusiform spicules, which completely cover the ectodermic layer of thepolypes. Eight or ten l
Catalogue of lithophytes or stony corals in the collection of the British Museum . rtila-ginous short. 40. KEEATOISIS. Polypidom branched; axis of the stem and branches consistingof nodes and internodes, the former stony, the latter horny; thestony joints vary from ^ to 1 inch in length ; the branches rise fromthe stony nodes, are not numerous, and present rather a straggling-appearance. The axis is covered with a barky layer, around whichthe polypes arise; this layer is studded over with numerous largefusiform spicules, which completely cover the ectodermic layer of thepolypes. Eight or ten large spicules (about -L inch each in length)form a circle around each polype ; these spicules are fusiform. Colour,when fresh, a light pink. Keratoisis, Perceval Wright, in Ann. 8f Mag. Nat. Hist. 1868, ii. p. 427,1869, iii. p. 24. The spicules of the bark not warty but smooth, those surroundingthe cells upon the polypes of great length. 19 98. Keratoisis Grayii. Keratoisis Grayii, Perceval Wru/ht, in Ann. t^- Maq. Nat. Hist. 1868,ii. p. 427, 1809, iii. p. 24, fig. Fi-. Fig. 7.
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