140 MADREPORARIA. 
17 em., breadth 21 cm. Peripheral branches short, 2°5 em. long, subsimple, the others in- 
creasing in length and diameter towards the centre; central branches 2 em. thick, divided 
into five main divisions at the same level, each of which is a little over 1 cm. diameter and 
again subdivided ; ultimate branchlets slender digitiform, with a very blunt apex ; about 
3 em. long and 7 mm. diameter, very slightly tapering. Avxial corallites 3 to 4mm. diameter, 
hemispherical, aperture very small. Radial corallites distant, thick, nariform or tubo- 
nariform, 3 mm. long and 2°5 mm. wide, but narrower and pointed near the apex; some are 
completely tubular and indicate new proliferations. The axial corallites are provided with 
six moderately developed septa, the directives a little broader than the others; in the radial 
corallites the directive septa are very broad and the other four quite narrow. Corallum 
moderately porous in section ; surface and wall strongly and closely echinulate throughout. 
The type specimen in the Paris Museum forms part of M. Botta’s collection from the 
Red Sea. The label bears the name M. pharaonis, M.-Edwards & Haime, but the specimen 
is so unlike the types of that species that it seems improbable Milne-Edwards would have 
included it under that name. The species resembles M. fruticosa and certain specimens of 
M. seriata somewhat in habit, but has distant corallites of different shape. 
Red Sea. (Paris Museum.) 
143. Madrepora amblyclados. 
Madrepora cf. globiceps, Ortmann, Zool. JB. 1888, Bd. iti. p. 151 (part.). 
Madrepora plantaginea, Ortmann (non Lamarck), Zool. JB. 1888, Bd. iu. p. 151 (part.). 
Corallum cespitose from a broad base, 10 to 15 em. high and about 18 cm. broad. Main 
branches 2 em. thick, bearing digitiform branches 2 to 2°5 em. long and 1 to 1°3 em. thick, 
more divided in some specimens than in others. Axial corallites 3°5 to 4°5 mm. diameter, 
occasionally 5 mm., scarcely exsert; wall very thick, aperture round or oval, 1 to 12 mm. 
when round. Radial corallites ascending, tubular, with a moderately thick wall and very 
oblique aperture, but the inner part of the wall is rarely absent excepting in young corallites ; 
length of the outer part of the wall 3 mm. or a little over ; diameter a little variable, usually 
about 2mm. Directive septa broad, the others rudimentary. Corallum moderately porous ; 
surface spongy-echinulate ; wall faintly striate, echinulate near the base. 
Four out of the five specimens doubtfully referred to M. globiceps by Ortmann appear 
to me to belong to this species. The fifth (Indian Ocean, Conrad) is referred to M. platy- 
cyathus. The Singapore specimen referred by Ortmann to M. plantaginea should probably 
be referred to this species also, but the branchlets are more proliferous at the apex and the 
radial corallites have scarcely so thick a wall as in the other specimens. 
Indo-Pacific Ocean: Indian Ocean (2 sp.) ; Singapore (2 sp.); Australia (1 sp.) (Stras- 
burg Museum). 
