192 
two mouths. In the region that divides the two parts of the corallum 
the theca often shows large folds where the new formed septa 
have developed (figs. 4 and 5). Some of these specimens with two 
mouths may also have resulted from the fusion of two anthoblasts, 
as in some cases a distinet groove is visible at the lower surface, 
dividing the corallum into two halves. But as the scar of detachment 
has completely vanished, there is no definite proof that fusion has 
taken place. These phenomena of fission in one anthoblast or 
perhaps of fusion of two antoblasts often lead to irregularities in 
the growth of the parts between the two mouths. The parts of the 
theca with the new septa, which develop at this spot have little 
room to grow and therefore the theca is often folded upwards 
forming irregular excrescences. The specimen of fig. 4 already 
possesses such protuberances in the marginal part of the corallum. 
In a more irregular specimen the central part of the corallum 
between the two mouths shows a double vertical protrusion on which 
new septa were formed. 
In Herpolitha (after Studer 1880) sometimes parts of the 
margin of the corallum fold outwards till they come to be situated 
on the lower surface. When these parts become isolated from the 
upper surface of the corallum, which often takes place after further 
growth of the margin of the corallum, they strongly resemble buds. 
These false buds too oceur sometimes in Fungia fungites (Boschma 
1922, 1923 b). In one specimen of Fungia hexagonalis a similar 
formation of a false bud has taken place (fig. 9). A portion of the 
corallum was more or less cut off from the rest and bent down- 
wards by the folding of the margin. In this portion a mouth had 
originated, around which the septa (which partially are portions of 
the old septa and partially new) are more or les radially arranged. 
Fungia patelliformis Boschma 1923 c. 
(Fl. V, figs. 12-14 and 21). 
Localities^)'. Cycloseris-specimens: 
D. E X p. t. K e i I si.: (^Stat. 10, 50 m, 1 ex.; Stat. 16, 50 m, 2 ex.;) Stat. 
19, 20 m, 14 ex ; (Stat. 20, 50 m, 1 ex.; Stat. 24, 100 m, 2 ex.; Stat. 39, 60 
1) The exact places of the Stations are given in Dr. Th. Mortensen's 
paper: The Danish Expedition of the Kei Islands. Vid. Medd D. Naturh Foren. 
Bd. 76. 1923. p. 91—99. The localities where the species was found only in 
a dead State are put in brackets. 
