52 MADREPORARIA. 
The calicles are superficial and obscure, indicated only by a minute fossa surrounded by 
six pali. The granules on the walls are scattered. 
I was fortunate enough to find what appears to be one of the original specimens of this 
coral in the Paris Museum (No. Z 185a); it had been presented by M. Agassiz. The corallum 
is built up of thick, erect, flame-like processes. The surface granules are echinulate or frosted, 
distinct and rising from a smooth flat floor, as shown in Dana’s fig. 6a. The septa are triangular 
tongues, and are arranged in the typical formula. There are six pali surrounding a conspicuous 
pinhole fossa. 
The growth-form of this Porites is something like that of the form from Tahiti (Porites 
Society Islands 3 = Verrill’s Synarewa convexa), but the calicles are of an entirely different 
type (see p. 30). 
A form said to resemble Dana’s figures occurs at Samoa (see p. 33). 
Esper’s Mad. contigua was apparently a Psammocora, as Dana suggested. 
25. Porites Fiji Islands 410. (2. Fidjiensis decima.) 
[“ Feejee Islands,” Wilkes Expedition, 1838-1842. ] 
Syn. Porites conglomerata Dana (non Esper), Zooph. (1848) p. 561, pl. lv. figs. 3, 3a. 
Description —The corallum is glomerate and as high as it is broad; the rounded top 
consists of a number of smooth tall hummocks, with sharp intervening valleys. 
The calicles are “angular, quite shallow, flat-conical,” 1°3 mm. in diameter. “The septa 
are very thin and acute.” 
This is Dana’s original description. His figure 3a shows what appear to be simple ragged 
septa or interrupted (= perforated) walls and septa, without any clear development of pali. 
There are indications of a central columellar tubercle, but very minute. 
There is no special reason to believe that this is the Porites from some unknown locality 
which Esper described and figured (Pflanzenth. Suppl. I, pl. lixa). The most striking feature 
of Esper’s coral is its growth-form, which is not very much like that figured by Dana. 
26. Porites Fiji Islands gall, (P. Fidjiensis wndecima.) 
[“ Feejee Islands,” coll. Wilkes’ Expedition, 1838-1842. | 
Syn. Porites fragosa Dana, Zooph. (1848) p. 563, pl. lv. figs. 9, 9a. 
Description—The corallum is glomerate, rising into a mound which is highest in the 
centre (“surface subangular ”), and covered with coarse lobes (“coarsely monticulose ”). 
The calicles are “subangular, shallow,” 1°3 mm. in diameter, and “plane at bottom.” 
The septa are “ obtuse.” 
