148 MADEEPOEARIA, 



C. Radial corallites with thick dense wall and rounded margin. 

 a. Inner part of the wall complete ; aperture central. 



153. Madrepora klunzingeii. 



Madrepora pvstulosa, Klunzinger (non M.-Edwards & Haime), Korallenth d. roth. Meeres, Th. ii. p. 8, 



pi. i. fig. 1, pi. iv. fig. 15, pi. ix. fig. 4. 

 Madrepora hlunzingeri, Quelch, 'Challenger' Eeef Corals, p. 158. 

 ^ Madrepora papulosa, n. n., Klunzinger, op. cit. p. 9. 



Corallum small and cespitose, 8 to 10 cm. high and broad ; branchlets chiefly digitiform, 



3 to 6 cm. long and 1 to 1*5 cm. thick, but tapered a little near the apex. Axial corallites 

 hemispherical or short conical, 5 to 6 mm. broad ; aperture scarcely 1 mm. Radial corallites 

 short, cylindrical, with rounded margin 2 to 4 mm. long and broad, with round aperture 



1 mm. in diameter. Corallum rather porous in section ; surface spongy-echinulate. 



Red Sea, 



154. Madrepora oceUata. 



Madrqiora ocellata, Klunzinger, KoraUenth. d. roth. Meeres, Th. ii. p. 9, pi. i. fig. 7, pi. iv. fig. 14, pi. ix. 

 fig. 5; Ortmann, Zool. JB. 1889, Bd. iv. p. 505. 



Corallum low, cespitose, 8 to 10 cm. wide and 2 to 4 cm. high. Branches digitiform, 

 obtuse, little divided excepting near the apex, 2 to 4 cm. long, 1 cm. thick. Axial corallites 



4 to 5 mm. broad and 1 to 2 mm. exsert, thick-walled with rounded margin and small (1 mm.) 

 aperture. Radial corallites not crowded, usually nariform or tubular, 3 to 4 mm. long and 



2 mm. broad, slightly compressed ; aperture small, round elliptical or oblique, outer part of 

 wall a little thickened and margin rounded; some of the tubular ones are elongate (7 mm.). 

 Near the base of the branches the corallites are verruciform with a few immersed ones 

 interspersed. Corallum porous above; surface echinulate or spongy-reticulate; wall not 

 striate. 



A specimen from Ceylon described by Ortmann diflfers from the type in having smaller 

 axial corallites, 3 to 4 mm. diameter and 1 mm. exsert. The species approaches M. hlun- 

 zingeri closely, and differs chiefly in the form of the radial corallites and in the thickness of 

 the wall. 



Indian Ocean : Red Sea, Ceylon, 



a. Ceylon. Haeckel Coll. 92. 12. 5. 7, 



155. Madrepora cophodactyla. (Plate XXIII. fig. E.) 

 Madrepora cophodactyla. Brook, Ann. Mag. N. H. 1892, vol. x. p. 455. 



Corallum broad, flattened, cespitose ; base 20 cm. diameter. Branches stout, short, suberect 

 and very obtuse at the apex, simple, or divided near the middle into two or more ascending 



