MALAY ARCHIPELAGO GONIOPOR^E. 65 



localities further south than King's Sound on the north-west. Hence I have provisionally 

 placed this coral near the N.W. Australian group. 



The description unfortunately gives no clue to the relationship of the coral with any of 

 the six forms above described from that region. The specimen from Zamboanga, to which 

 Mr. Quelch gave the name Calicularis, is described on p. 68. Mr. Saville-Kent, in his ' Great 

 Barrier Reef,' p. 187, says that " Eh. calicularis " is common on the Great Barrier Reef. But 

 I have been unable to identify any of the specimens from that locality with Lamarck's type. 



Group III.— MALAY ARCHIPELAGO. 



Containing descriptions or records of Gonwporm from Moluccas (1); Celebes (1); Philippines (1-4): 

 China Sea (1—5) ; Java Sea (1-4) ; and Singapore (1-6). 



34. Goniopora Moluccas d)l. (PL IV. fig. 7.) 

 [Amboyna, coll. H.M.S. 'Challenger' ; British Museum.] 

 Rlwdama tenuidens, Quelch (partim), Chal. Rep., xvi. (1886) p. 188, pi. viii. figs. 7, 7a, 76. 



Description. — The corallum massive, smooth, oval, apparently built up by successive 

 cushion-like growths (see Introduction, p. 24, fig. 2c), each consisting of a thick (ca. 2 cm.) 

 layer with bulging sides, and with its edge tending to curl under and not to envelop the 

 whole stock. 



The calicles are 3 mm. in diameter, subcircular, with cylindrical fossae of varying depths 

 up to 3 mm. Wall of unequal thickness, the thinner parts very thin, fragile, and so fenes- 

 trated as to form an open lattice-work with frilled ragged edges ; the thicker parts, seen from 

 above, are a delicate open reticulum, chiefly confined to their top edges, below which they 

 appear membranous and very porous. Though the tops of the walls are reticular no radial 

 structures can be traced across this reticulum (fig. 7), not even in the shallower calicles at 

 the sides. Within the fossa, however, and below the margin, 24 septal ridges, or rows of 

 short exquisitely fine points, run down the walls. From what appear to be the primaries 

 thin irregularly radial paliform plates rise up, but do not reach to the top of the wall, except 

 in small intercalicular buds. The secondaries (?) are merely rows of long thin spikes, often 

 bent so as to fuse with the primaries. The tertiaries are minute hair-like points, set with 

 broad bases on the wall. The septal formula is obscured. There is often a central tubercle, 

 which in the deep calicles is a median directive plate. Owing to the rudimentary conditions 

 of the tertiaries the interseptal loculi are conspicuous. 



In the vertical section a striking contrast can be seen between the stout vertical and the 

 horizontal elements of the skeleton. Tabulae are very numerous. 



