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MADREPORA. ie 
132. Madrepora hispida. (Plate IX. fig. C.) 
Madrepora securis, Quelch (non Dana), ‘ Challenger’ Reef Corals, p. 148. 
Madrepora hispida, Brook, Ann. Mag. N. H. 1891, vol. vii. p. 462. 
Corallum similar to that of M. palifera, Lamk., consisting of thick plates 4 to 8 cm. 
broad and 2 to 3°5 em. thick, or in other cases of thick, elongate, rounded branches, 3 to 6 
em. diameter near the base, and rarely under 3 cm. near the apex. Apices usually flattened. 
Corallites at the apex 2°5 to 3 mm. diameter, with smaller ones scattered between; walls con- 
fluent asin M. palifera. Radial corallites usually crowded, but sometimes rather distant, short 
nariform or tubo-nariform, but the inner part of the wall always short and thin. Diameter 
15 mm., length 2 mm. The wall and surface of the coenenchyma consist of radiating 
spinose plates, giving a very hispid appearance. The septa are arranged in two cycles, the 
directives broad, the other primaries narrow, the remainder rudimentary. The species differs 
from M. palifera, Lamk., in the smaller size of the corallites and the hispid character of the 
surface. 
Pacific Ocean: Philippines, Banda, Arafura Sea, Ponapé. 
a. Banda. H.M.S. ‘Challenger.’ 86. 12. 9. 245.) 
(=M. securis, Quel.). | 
b. Philippines. H.M.S. ‘Challenger.’ 86. 12. 9. 336. 7. 
(=M. securis, Quel.) Ae 
c. Samboangan, Philippimes. H.M.S. ‘Challenger.’ 92. 10. 16. 29. 
(=M. securis, Quel.) J 
d. Fimders Bank, Arafura Sea, 9 fathoms. H.M.S. ‘Penguin.’ 92. 4. 5. 2. 
e. Ponapé Island. Mus. Godeffroy. 81. 11. 21. 8. 
B. Corallites tubular. 
138. Madrepora securis. 
Madrepora securis, Dana, Zoophytes, pp. 486 & 487, pl. xliii. fig. 2; M.-Edwards & Haime, Coralliaires, 
t. 11. p. 161; Studer, MB. Akad. Wiss. Berlin, 1878, p. 535; Rathbun, Proc. U.S. Nat. Mus. 
1878, vol. x. p. 18 (non Quelch, ‘ Challenger’ Reef Corals, p. 148). 
Corallum cespito-laminate ; plates erect, oblong, quadrate at apex and strongly truncate, 
searcely lobed, 12 to 25 mm. thick; surface uneven. Corallites very closely crowded, stout 
and short, tubiform, 1:5 to 2 mm. broad, scarcely striate; aperture entire, circular; star 
distinct. (Dana.) 
The type specimen is 15 cm. broad and consists of a cluster of oblong plates from a 
common base, each 7°5 to 10 cm. long, 5 to 6°3 cm. broad, and 12 to 25 mm. thick. The 
corallites differ from those of M. palifera in size, and also have a circular aperture. In 
M. palifera the margin is wanting on the upperside. 
Amirante Islands, East Indies, Solomon Islands. 
a-c. Amirante Islands. H.M.S. ‘ Alert.? 82. 10. 17. 128, 154, & 211. 
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