278 PERCY SLADEN TRUST EXPEDITION. 
of the septa except those of the last cycle end in coarse, bluntly angular teeth, on the 
largest septa generally 4 or 5 in 1 em. by 2 to 3 mm. in height; a longer blunter tooth, 
almost a small tentacular lobe, at the inner ends of the septa of cycles IV to VI or VII; 
sides and teeth of septa finely granular. Synapticula low, not visible from the surface. 
The dimensions of the specimens are 178, 160, and 159 mm. long by 165, 145, and 
149 mm. broad by 51, 41, and 46 mm. high. The axial fossa varies from 20 to 30 mm. 
long. 
Locality. Salomon Atoll, Chagos Archipelago. 
The species cannot be the same as 7. madagascarensis, which Vaughan places in the 
Fungites-group (Proc. U.S. Nat. Mus. vol. xxx. p. 831). The photograph of the latter, 
however, appears to me to be not unlike a specimen of the species under consideration 
existing under most unfavourable conditions. The costal spines in F. madagascarensis 
are smooth, whereas those in F. fieldi are granular and place it in Déderlein’s Repanda- 
group. I have called the species after Rear-Admiral A. Mostyn Field, head of the 
Hydrographic Office of the Admiralty, under whose orders the Sealark was sent out. 
g. Danai-group. 
16. Fungia acutidens, Studer. 
Studer, Monatsb. Akad. Wissensch. Berlin, 1877, p. 649, t. 4. fig. 13; Dédderlein, Senckenb. 
naturfors. Gesellsch. Abhandl. xxvii. p. 121, t. 14. figs. 2, 2a. 
I refer four young specimens, the largest of which are 82 and 74 mm. in diameter, to 
the above species. The scars of attachment are still visible on all; the larger have 
precisely similar costze and septa to those described for the species, but with spines and 
teeth relatively more elongated and pointed. 
Locality. Reefs of Sawakin, Red Sea, collected by Mr. C. Crossland. Previously 
known from New Ireland. Quelch further records (‘ Challenger’ Reports, p. 135) 
three specimens from Tahiti, but these require to be re-examined after Déderlein’s careful 
study of the genus. 
17. Fungia danai, Milne-Edwards & Haime. 
Déderlein, Senckenb. naturfors. Gesellsch. Abhandl. xxvii. p. 129, tt. 14-18 (numerous figures) ; 
Gardiner, Fauna and Geogr. Maldives & Laccadives, p. 941. 
I have before me four specimens from Minikoi Atoll; the species is also recorded 
from Madagascar, Ceylon, E. Indies, and Philippines. 
18. Fungia corona, Doderlein. (Plate 35. figs. 11, 12.) 
Déderlein, Senckenb. naturfors. Gesellsch. Abhandl. xxvii. p. 132, t. 15. figs. 2, 2a. 
I have two complete and one broken specimen before me, the former measuring 136 
and 130 mm. long by 121 and 123 mm. broad by 42 and 40 mm. high, which in all 
their characteristics almost exactly agree with this species. They are all rather more 
arched or cap-like, hollowed out underneath. Specimens of any species growing in this 
manner tend to have rougher, stronger, and more elongated spines on their coste than 
