276 PERCY SLADEN TRUST EXPEDITION, 
12. Fungia granulosa, Klunzinger. 
Klunzinger, Korallenthiere des Rothen Meeres, iii. p. 65, t. 7. fig. 3& t. 8. fig. 3; Déderlein, 
Senckenb. naturfors. Gesellsch. Abhandl. xxvii. p. 108, t. 11. fig. 1. 
Fungia crassitentaculata, Gardiner, Proc. Zool. Soc. 1898, p. 527. 
A single specimen from Rotuma lies before me, measuring 129 mm. long by 121 mm. 
broad and 42mm. high. It certainly belongs to the imperforate section of the Repanda- 
group, and possesses almost typically the characters of the above species. ‘The species 
is only known otherwise from the Red Sea, whereas its nearest ally, /. scabra, is an 
East Indian form. 
13. Fungia concinna (Verrill). 
Fungia concinna et F. plana, Déderlein, Senckenb. naturfors. Gesellsch. Abhandl. xxvii. pp. 111- 
114, t. 11. figs. 2-5, t. 12. figs. 1-3, t. 13. fig. 4. 
Fungia dane, Gardiner, Proc. Zool. Soc. 1898, p. 527. 
The suggestion that Vaughan made that F. plana and F. concinna form a continuous 
series appears to be amply borne out by our collections, which contain 39 specimens of 
the species. His further idea that F. repanda forms part of the same species is not, 
however, supported by the characters of any single one of our specimens. 
The corallum is round but has a slight tendency to be oval, the length averaging 
about 10 per cent. more than the breadth; it is generally flat, but may be somewhat 
distorted or bent in at its edges and arched. It feels lighter than any of the Fungia, I 
have seen, not belonging to the Diaseris- and Cycloseris-groups. In 32 of the specimens 
the wall (theca) is imperforate and in 7 slightly perforate, a few slits being left between 
the cost near the edge of the corallum, the central two-thirds of the disc being 
imperforate. While specimens both of the perforate and of the imperforate forms attain 
to lengths of upwards of 125 mm., the smallest of the perforate (76 mm.) is larger than 
16 of the imperforate forms. The specimens in the characters of the coste and spines _ 
of their lower sides show a complete series between the specimens figured by Déderlein, 
one specimen having still more marked inequality in its coste. The axial fossa is 
distinctly small but markedly shares in the elongation of the specimens ; 20-24 septa 
reach it, of which 12-16 are rather more projecting or prominent. Seven cycles are 
complete in the largest specimens, and there are present about half those belonging to 
cycle VIII; pairs of septa of cycles V-VIII generally fuse or meet in front the septa of 
cycles [V-VII. Even in the imperforate forms alone may be found a complete series 
between the small teeth described by Déderlein in plana and the large teeth in concinna ; 
the mode of the larger specimens is rather that of concinna. In some specimens the 
serrations become less marked, almost obsolete, towards the fosse. There are no 
tentacular lobes. The septal faces are slightly ridged, corresponding to their serrations, 
and minutely granulated; near the free margins of the septa most specimens show 
several rows of minute wavy lines or wrinkles parallel to the edges. The columella, 
which is often hidden by the septal edges, is formed of minute spongy tissue. 
The specimens of concinna before me (39) show in all their characters about the same 
range of variation as described by Déderlein in other species of which he had similar 
