231 
corallum is regenerating by the formation of new septa. At the 
lower surface, beneath the dead part a young stage of a lateral 
bud is visible. The septa of the bud, which have developed by 
broadening of the costal spines, are clearly radially arranged round 
its centre. In another part of the same corallum an older stage of 
a lateral bud is to be seen, which is attached with a broad base to 
the mother-corallum. It has a very deep axial fossa and distinctly 
radiating septa. The septa are much thicker than those of the 
youngest coralla of Herpolitha developed from planulae; on the 
whole the bud reminds one strongly of a young attached Fungia. 
In another specimen of Herpolitha there is a bud in the neigh- 
bourhood of a regenerated part. Here also the septa are distinctly 
radially arranged round the central axial fossa (fig. 117). The 
arrangement of the septa in different cycles is somewhat indistinct, 
but at First sight this bud shows a great resemblance with lateral 
buds of Fungia. 
In Dana’s type-specimen of Herpolitha crassa also buds have 
developed at the lower surface. In the figure of this specimen 
given by Va ug han (1918, PI. 53, fig. 1) two large buds with 
radial arrangement of the septa are visible, situated close to one 
another at one end of the corallum. 
It is a noticeable faet that the lateral buds in the colonial 
Fungids (cf. also the description of these processes in the species 
of Halomitra) have the shape of a young Fungia, even more than 
the young forms of the same species of the same size that have 
developed from planulae. The genus Fungia is the most primitive 
of the family and these buds, which take their origin in places 
where normally no calicles are formed, always assume the primitive 
circular shape. They also remain much longer solitary than the 
anthocyathi which develop from planulae (cp. also below under 
Halomitra philippinensis). 
Polyphyllia Quoy and Gaimard. 
The 46 specimens of this genus collected by the Danish Ex- 
pedition to the Kei Islands all belong to the species P. talpina 
(Lam.), the original description of which was based on Seba’s Tab. 
CXI, fig. 6 and Tab. CXII, fig. 31 (1761). 
