70 MADREPORARLIA. 
The septa and pali all run together as fine frosted ridges, the directive sometimes joining the 
flattened columellar tubercle to form a keel right across the calicle. 
The single specimen is only a fragment from the projecting edge of the stock. It was 
classed by Mr. Gardiner as of the same species as the next form, and it is very probable that 
the next may be but a rounded growth-form of this coral, yet the differences in the sizes of 
the calicles cause me to hesitate to class them together. See below. ; 
A peculiar striation runs through the calicles of the under surface radially outwards. 
It is shown in Pl. VL. fig. 2, running from left to right. 
al ek Zool. Dept. 1904. 10. 17. 28. 
46. Porites Ellice Islands qy7, (P. Eiliciana septima.) (Pl. VI. fig. 3.) 
[Funafuti (lagoon), coll. J. S. Gardiner; British Museum. ] 
Syn. Porites umbellifera (partim) Gardiner, Proc. Zool. Soc. (1898) p. 271. 
Description.—The corallum is massive, and with smooth rounded surface. The complete 
form is unknown, the specimen being only a small chip. 
The calicles are mostly under 1 mm.; in essential structure they are like those of the 
last form, but in aspect they are very different. The skeletal elements are smooth instead of 
frosted, the wall-ridge is stouter and continuous, the synapticular ring is also stouter and 
therefore closer to the wall-ridge. The septal apparatus is of the same type, but is sunk 
slightly beneath the surface; the septa and pali, and indeed, all the intra-calicular elements 
are smooth, and even tend to be flaky and less symmetrical than in the preceding form. 
The interseptal loculi are again large and open, and make the calicles look like dark round 
spots crowded on the smooth white surface. 
It will be noted that, as far as one can judge from the specimen, this coral differs from 
the last in growth-form and in the thickness, and absence of frosting, of the skeletal elements. 
Tt is possible that the differences may again be referred to differences in position in the water 
(cf. specimens @ and ¢ of No. 5), and that this is but a massive form of P. Ellice Islands 6. 
But in this case, the calicles of the round form are smaller, and the skeletal reticulum is 
not much lighter but only smoother than that of the flat-topped form. 
a. Zool. Dept. 1905. 1. 9. 17. 
47. Porites Ellice Islands q7, (P. Elliciana octava.) (Pl. VI. fig. 4; 
PL XIIZ. figs. 17, 18.) 
[Funafuti (lagoon), coll. J. S. Gardiner; British Museum.] 
Syn. Porites arenosa (partim) Gardiner (non Esper), Proc. Zool. Soc. (1898) p. 272. 
Description.—The corallum is massive, rounded, and with edges closely adherent. The 
surface is smooth or but slightiy wavy. 
The calicles are crowded, separated only by sharp, thin wall-ridges, 0°5 mm. high; 
