REPORT ON THE REEF-CORALS. 161 
and sometimes rudimentary ones. Lateral calicles somewhat smaller, nearly 2 mm. 
wide, unequal, from 1°5 to 5 mm. long, subseriate, tubo-nariform and rostrato-nariform, 
not crowded; often rather widely placed, appressed, round-nariform and very short, 
_especially on the basal parts of the stem and chief branches; star distinct, of six large 
septa, others smaller and rudimentary, two of the opposite, large septa generally united 
together almost to the very aperture. Ccoenenchyma reticulated and dense; surface 
throughout finely or strongly costulated and echinulated. 
This well-marked species is represented by a single specimen about 17 em. 
high. 
Locality.—Samboangan, Philippines. 
36. Madrepora diffusa, Verrill. 
Madrepora diffusa, Verrill, Bull. Mus. Comp. Zodl., Cambridge, U.S.A., vol. i. p. 41. 
The specimen consists of an arborescent trunk, the larger branches of which are 
spreading, much divided, and rather prostrate. On the small branches and branchlets 
the texture of the corallum becomes very light and open, though firm; while the 
costee become scarcely spinulose, and are more distinctly lamellate than on the basal 
parts. 
Locality.—Banda. 
37. Madrepora tubigera, Horn. 
Madrepora tubigera, Horn, Proc. Acad, Nat. Sci. Philad., 1860, p. 435. 
A fine specimen of this species was obtained. It consists of a much divided, prostrate 
stem, from which branches and branchlets arise to very different heights. Some of the 
branches are much subdivided and form a dense clump. The whole corallum is very 
porous ; the calicles are large and open, and on the stem and chief branches they become 
immersed. 
Locality— Banda. 
38. Madrepora capillaris, Klunzinger. 
Madrepora cupillaris, Klunzinger, Cor. roth. Meer., ii. p. 29, pl. iii. fig. 4. 
Several fragments were obtained. The cups are often much smaller than those in 
Klunzinger’s specimen, fragile and labellate or dimidiate. It bears a general resemblance 
to a small and delicate variety of Madrepora tubigera, but differs in the nature of the 
ealicles and of the surface, and in the thickness of the branches. 
Locality.—Banda. 
(ZOOL. CHALL, EXP.—PART XLVI.—1886.) Zz 21 
