68 MADREPORARTA. 
50. Madrepora stigmataria. 
Madrepora stigmataria, M.-Edwards & Haime, Coralliaires, t. iii. p. 145. 
? Madrepora repens, Rehberg, Abh. nat. Ver. Hamburg, 1892, Bd. xii. p. 36, pl. iy. fig. 8. 
Corallum extending subhorizontally from a rounded base in the form of a flattened 
vasiform fan, with frequent fusions. Main branches lax, with large spaces between, 1°7 cm. 
diameter near the base. Subdivisions lateral, almost in one plane and becoming gradually 
attenuated. Ultimate divisions 1 to 3 em. long, fused at the margin. Axial corallites 
2°5 mm, diameter, scarcely exsert; star of 6 subequal septa of moderate breadth, with some- 
times a rudimentary second cycle. Radial corallites appressed nariform, with rather thick 
wall, variable in size, at most 1°75 mm. long and 2 mm. broad, but the majority are sub- 
immersed ; star rudimentary, only the directive septa are recognizable. Corallum dense; 
surface finely granular throughout ; the “ granulations” consist of small spines with blunt or 
irregular apices. 
The above description is based on the type in the Paris Museum. 
Indian Ocean : Seychelles. 
51. Madrepora subtilis. 
Madrepora subtilis, Klunzinger, Korallenth. d. roth. Meeres, p. 28, pl. ii. fig. 7, pl. iv. fig. 4, pl. ix. 
fic, 22 
B+ <4. 
Corallum arborescent, laxly subdivided ; the branches chiefly iu one plane, with frequent 
fusions. Branches and branchlets slender and elongate, the stoutest not over 8 to 12 mm. 
diameter ; ultimate divisions 1 to 4cm. long and only 4 to 5 mm. thick at the base, gradually 
tapering. Axial corallites 2 to 3 mm. broad, 3 to 5 mm. long. Radial corallites mostly short 
and small, 2 to 4mm. long and 1 to 2 mm. broad, very distant, spreading, nariform, and 
round labellate. Scattered between are a number of tubular corallites 4 to 5 mm. long and 
2 mm. broad ; aperture small, round or oblique; the larger ones bear one or more lateral bud- 
corallites. Corallites distant and shorter on the underside of the corallum, more appressed, 
rarely immersed. Star little prominent. Corallum very porous; surface ribbed, trabecular, 
with rows of broad flattened echinulations. 
A specimen from the Solomon Islands appears to differ only in the absence of fusions 
and the less complanate branching. 
Indo-Pacific Ocean: Red Sea, Solomon Islands. 
a. Solomon Islands. H.M.S. ‘ Herald.’ 55. 12. 7. 150. 
52. Madrepora reticulata. (Plate IV. figs. A, B.) 
Madrepora reticulata, Brook, Ann. Mag. N. H. 1892, vol. x. p. 461. 
Corallum complanate and reticulate; largest specimen 36 cm. long and 20 cm. broad. 
Branches rarely over 7 mm. diameter, forming a network with elongate meshes, which are 
