120 MADREPOEAEIA. 



a-d. Capricorn Islauds. Saville-Kent Coll. 92. 6. 8. 187, 188, 194, & 262. 



e. Thursday Island. Saville-Kent Coll. 92. 6. 8. 193. 



/. Low Woody Island. Saville-Kent Coll. 92. 6. 8. 195. 



117. Madrepora squamosa. (Plate XX. fig. B.) 



? Madrep<yra millejjora, Sana (non Ehrenberg), Zoophytes, p. 446, pi. xxxiii. fig. 2. 

 Madrepwa squamosa. Brook, Ann. Mag. N. H. 1892, vol. x. p. 463. 



Corallum corymbose, subvasiform, about 27 cm. diameter and 13 cm. high; branches 

 rarely coalescent. Under surface oblique ; branches 8 to 12 mm. diameter, not flattened, 

 bearing numerous elongate twigs which extend horizontally, 1*5 to 3 cm. long, 6 mm. 

 diameter near the base, terete and slowly tapering to a blunt apex ; axial corallites scarcely 

 prominent ; radial corallites all immersed or subimmersed. Branches on the upper surface 

 simple or subsimple near the centre of the corallum, but more divided near the periphery ; 

 the central ones are 4'5 cm. long, 8 mm. diameter near the base, 4 mm. near the apex, apices 

 about 1*8 cm. apart. Axial corallites cylindrical, 2*5 to 3"5 mm. diameter, 1*5 mm. exsert, 

 wall thick, star very well marked, the directive septa rarely more prominent than the others. 

 Radial corallites of the central branches equal, small, labellate, with rounded lip, spreading 

 almost at right angles, rarely over 1 mm. diameter and 0*75 mm. long, but becoming wider 

 and subimmersed towards the base of the branches. On the marginal branches the corallites 

 are much larger and more distant ; usually 2 mm. diameter, 2 mm. long, and the lips are nearly 

 2 mm. apart ; near the apex of the twigs the corallites are scarcely so spreading as in the 

 other parts, and the form is usually flattened labellate. Corallum porous; surface reticulate 

 and echinulate ; wall fragile, fenestrated. The star consists of 6 moderately developed septa 

 in the corallites of the outer branches, but the directives, and particularly the lower one, are 

 more prominent and thicker than the others ; in the corallites of the central branches the star 

 is quite indistinct, often only the lower directive septum is recognizable. 



This species appears to agree closely with Dana's figure of M. millepora, which is 

 probably not the species described by Ehrenberg. The contrast between the size of the 

 radial corallites on the central as compared with the peripheral branches is more marked 

 than in any other species which has come under my notice. 



Pacific Ocean : Great-Barrier Reef, East Indies {Dana). 



a, b. Cleremont Island. Saville-Kent Coll. 92. 6. 8. 163 & 196. 



c. Rocky Island. Saville-Kent Coll. 92. 6. 8. 189. 



118. Madrepora subulata. 



I Types. 



Madrepora svhulata, Dana, Zoophytes, p. 448, pi. xxxii. fig. 3 ; M.-Edwards & Haime, Coralliaires, 

 t iii. p. 155; Studer, MB. Akad. Wiss. Berlin, 1878, p. 527 ; Rathbun, Proc. U.S. Nat. Mus. 

 1887, voL X. p. 19. 



Corallum pedicellate and prostrate, plane above ; branches 12 to 15 mm. thick, loosely 

 intricate, and remotely coalescent, not flattened. On the under surface the branchlets are 



