80 ' MADREPORARIA. 
species. They consist of marginal fragments of a colony of M. tubigera, as was suspected 
by Quelch himself. The elongate tubular corallites are here more numerous and there is an 
absence of the thicker tapering branchlets frequent in the larger specimens. The species of 
which Fowler gives an account of the structure under the name M. durvillei, Ed. & H., is 
the same as that recorded as M. capillaris by Quelch. 
The Coralhaven specimen has a number of the lateral corallites elongate and tubular, 
with a round or oblique aperture. 
Singapore, Banda, Louisiade Archipelago. 
a, 6. Banda. H.M.S. ‘Challenger.’ 86. 12. 9. 273 & 241. 
?c. Banda. H.M.S. ‘Challenger.’ 86.12.9.240. (=M. 
capillaris, Quelch.) 
d. Coralhaven, Louisiade Archipelago. J. Macgillivray, Esq. [P.]. 51.9. 29. 40. 
67. Madrepora capillaris. 
Madrepora capillaris, Klunzinger, Korallenth. d. roth. Meeres, Th. ii. p. 29, pl. iii. fig. 4, pl. iv. fig. 13, 
pl. ix. fig. 23 (non Quelch, ‘ Challenger’ Reef-Corals, p. 161). 
Corallum arborescent ; stem 20 cm. long, 15 to 20 mm. thick. Main branches clothed 
with very numerous, spreading, very slender, elongate, often divided, tubular branchlets, 
which are scarcely thicker near the base of the corallum than above; they vary from 1 to 
6 cm. in length and from 3 to 4 mm. in thickness, their apices being about 1 cm. apart. 
Axial corallites 2°5 to 3 mm. broad, usually bearing lateral buds to within 2 or 3 mm. of the 
apex; some of the shorter twigs consist of simple, often arcuate corallites, spreading almost 
at right angles, and broader at the apex than at the base. Radial corallites of the branchlets 
3 to 4 mm. long, 2 to 3 mm. broad, dimidiate, open nariform, very spreading, and distant ; 
those of the stems and main branches short, appressed, verruciform, or with a sharply defined 
ring-shaped border, rarely completely immersed. Corallum dense, but fragile on account of 
the long slender branchlets ; surface dense and striate, with very small echinulations and 
granules ; wall strongly striate, not echinulate. 
Red Sea; ? Great-Barrier Reef. 
?a. Port Denison. Saville-Kent Coll. 92. 6. 8. 
? 6. Rocky Island. Saville-Kent Coll. 92. 6, 8. 
ci) 
80. 
76. (Young.) 
ci) 
68. Madrepora diffusa. 
Madrepora diffusa, Verrill, Bull. Mus. Comp. Zool. 1864, vol. i. p. 41; Quelch, ‘Challenger’ Reef- 
Corals, p. 161. 
Corallum low, arborescent, much branched, recalling the habit of M. formosa; branchlets 
divaricate, gradually tapering to an acute apex; about 8 mm. thick and 5 to 7:5 cm. long. 
