MADEEPOEA. 47 



The above is a description of the type of Lamarck ; the specimen was collected by P^ron 

 during his voyage to the East, but the exact habitat is not known. 



Var. fissilabia. 

 A variety from the Macclesfield Bank differs from typical specimens in the form of the 

 corallites. These are erect with the outer part of the wall thickened, the inner part thin and 

 not usually so prominent as the outer, often with a slit-like space on the inner aspect. 



Indo-Pacifie Ocean : Seychelles, Rodriguez, Macclesfield Bank, and Great-Barrier 

 Reef. 



a. Seychelles. H.M.S. ' Alert.' 82.10.17.139. 



b. Rodriguez. Royal Society. 76. 5. 5. 91. { = M. pha- 



raonis, Briigg.) 



c. ? ? 37. 6. 10. 11. 



d-g. Palm Island. Saville-Kent Coll. 92. 6. 8. 68 to 71. 



h. Rocky Island. Saville-Kent Coll. 92. 6. 8. 72. 



i. Warrior Island. Saville-Kent Coll. 92. 6. 8. 75. 



j, k. Low Woody Island. Saville-Kent Coll. 92. 6. 8. 77 & 78. 



Var. fissilabia. 



a-h. Macclesfield Bank, 13 fathoms. H.M.S. 'Penguin.' 92. 10. 17. 33 to 42. 



i. Macclesfield Bank, 13 to 23 fathoms. H.M.S. 'Penguin.' 92. 10. 17. 43. 



j. Macclesfield Bank, 13 fathoms. H.M.S. 'Penguin.' 92. 10. 17. 84. 



26. Madrepora multiformis. 



Madrepora multiformis, Ortmann, Zool. JB. 1889, Bd. iv. p. 504, pi. xi. fig. 2. 

 Madrepora valenciennesi, Ortmann, loc. cit. p. 503. 

 Madrepora cf. formosa, Ortmann, loc. cit. p. 504. 



Corallum variously shaped, arborescent, more or less branched ; often much branched 

 and covered with budding branchlets, and then resembling M. abrotanoides. Branches 1 to 

 3 cm. thick. Axial corallites usually 2 mm. broad and 2 mm. exsert, rarely more. Radial 

 corallites very unequal, immersed, nariform, or tubular with oblique, oval, or slit- like aper- 

 ture. Coenenchyma porous and finely echinulate. {Ortmann.) 



The radial corallites are 4 to 5 mm. long, with shorter and immersed ones between ; the 

 aperture is oval and oblique and usually opens inwards. 



Indian Ocean : Ceylon. 



a-f. Ceylon. Haeckel Coll. 92. 12, 5. 1 to 6. 



g-j. Ramesvaram, Madras Museum. 93. 4. 7. 147 to 149 & 153. 



k. ? ? 37.6. 10. 11. 



? I. ? ? 93. 4. 7. 150. 



h2 



