58 MADREPORARIA. 
are obtuse at the apex. 2. There are no apical clusters of short branchlets. 8. Stout 
proliferous corallites, though not absent, do not form a marked feature. 4. Immersed 
corallites appear to be entirely or almost entirely absent. 
Tahiti. 
38. Madrepora pharaonis. 
Madrepora pharaonis, M.-Kdwards & Haime, Coralliaires, t. 11. p. 143 (non Briiggemann, Phil. Trans. 
1879, vol. clxviii. p. 574). 
? Madrepora pustulosa, M.-Edwards & Haime, Coralliaires, t. ii. p. 144 (non Briiggemann, non Klun- 
zinger). 
? Heteropora lawa, Haeckel, Arab. Korallen, pl. 2. fig. 7 (non Ehrenberg, non Lamarck, &c.). 
Madrepora microcyathus, Klunzinger, Korallenth. d. roth. Meeres, p. 22, pl. iii. fig. 3, pl. iv. fig. 19, 
pl. ix. fig. 17. 
Madrepora scandens, Ridley & Quelch (non Klunzinger), in H. O. Forbes’s Naturalist’s Wanderings in 
the Eastern Archipelago, London, 1885, p. 44. 
Type. Corallum arborescent with stout branches, between which occasional fusions occur, 
recalling the habit of M. crassa. Branches 2°3 em. thick, 30 cm. long, laxly subdivided. 
Axial corallites 2°5 mm. diameter, 1°5 mm. exsert ; septa in two cycles, the directives scarcely 
broader than the other primaries. Jadial corallites chiefly immersed, with a few labellate, 
but scattered between are tubular ones almost at right angles, about 5 are distributed to each 
2:5 cm.; these are 3mm. long and 2 mm. diameter, and mostly bear a rosette of short 
labellate corallites. The tubular proliferous corallites have apparently only 6 septa, the 
directives much broader than the others. In the immersed corallites the septa are more 
nearly equal. Corallum moderately porous; surface reticulate and echinulate; wall striate 
and fragile. (The specimen appears worn.) 
Another specimen in the Paris Museum, from the same locality, is labelled M. pustulosa, 
and if this should prove to be the type of M.-Edwards’s species it is certainly not distinct 
from the above. M.-Edwards, however, gives Seychelles as the habitat of his M. pustulosa ; 
but'so far as I can ascertain there is no specimen of the species from that locality in the 
collection, and the description given agrees fairly well with this specimen. The specimen 
here referred to is a fine well-preserved form with the following characters :—Main branches 
3 cm. thick, much divided, with numerous spreading and tapering branchlets. Axial coral- 
lites 2°5 to 3 mm. diameter, 3 mm. exsert. Radial corallites simple, tubular with oblique 
aperture, of variable length up to 4 mm., and 1°5 mm. diameter, at an angle varying from 
60° to 80°, with short, nariform, labellate and immersed ones between. ‘This is the 
arrangement on the younger branches ; in other parts the tubular corallites become elongate 
and proliferous, up to 2°5 em. in length, 5 mm. diameter at the base, with tubo-labellate 
bud-corallites at an angle of about 60°; the majority of the proliferations are, however, only 
from 5 to7 mm. long. This specimen appears to me to give the real characters of the 
species better than the type. 
A third specimen of enormous size, over 1 m. diameter, shows the proliferations still 
more elongate, forming branchlets averaging 15 mm. in length. All three specimens are 
from the Red Sea, and were collected by Botta in 1837. 
