MALAY ARCHIPELAGO GONIOPOR^. 83 



There are patches on this coral showing the same upwardly streaming lamellate reticulum 

 as was noted in the last coral. In the calicles opening in such patches we see a proliferation of 

 the septa as delicate, wavy, highly perforated plates, filling up the calicle flush with the surface 

 (fig. 5). The position of these patches at the tops or points of bulging processes, taken together 

 with the fact tliat this proliferation of lamellate septa is characteristic of the growing tops of 

 other Gonioporas mentioned under last heading, leads us to think that these are centres of 

 rapid growth. But at the same time they look in this case like places where normal growth 

 has been hindered by proximity to some foreign object. 



There are t\^'o specimens of this coral. A large mass growing on the edge of a dead 

 Agaricia, with lobes swelling out in all directions. This is in the Cambridge University 

 Museum, while the smaller duplicate is in tlie British Museum. The smaller specimen, 

 figured on PI. XIII., is pear-shaped, with a stalk-like base. 



a. Presented by Mus. Univ. Camb. Zool. Dept. 1902. 9. 9. 7. 



A larger specimen is in the University Museum at Cambridge. 



53. Goniopora Singapore (6)5. (PI. VI. figs. 7 and 8 ; PI. XIII. fig. 3.) 



[" Eabbit Island, Baffles Lighthouse, outer part of reef, very narrow, and not very flourishing," 

 coll. Bedford and Lnnchester ; Cambridge University Museum, and duplicate in 

 British Museum.] 



Description. — The corallum rises as an elongated swelling knob, which divides into fresh 

 swelling knobs of different sizes, the whole resulting in thick branching clusters ; the 

 terminals being shaped according as there is room for them to grow. The outermost knobs tend 

 to curve inwards. The basal stalk is about 3 cm. thick, the stems of the topmost lobes some- 

 what thicker. The living layer is 7-8 cm. deep on the outer surfaces, less on the inner lobes. 



Calicles angular, open, very shallow, conical and deep only on growing tips, variable in 



size between 2 and 3 mm. The walls at the top consist of a fine, very angular filamentous 



matted reticulum, in which the buds develop as breaks. Round the topmost area the calicle 



walls are thin, perforated, and very irregularly zigzag (fig. 7). Still lower down the nodes of 



the wall reticulum swell into large solid granules, so that the walls become ultimately low 



irregular rows of closely packed grains, making them look thick and soUd ; only very low 



down do the granules become more regularly arranged like the tops of radiating septa (fig. 8). 



The septal stria^ on the walls are mostly obscured by the fact that the septal teeth are 



irregular and bent about, meeting and fusing, and forming a kind of nap on the walls. 



Where lower down they meet the columella their radial symmetry is lost (see fig. 7). The 



centre of the calicle is occupied by the columellar tangle, which on the top is an open 



filamentous reticulum, solidifies laterally into a mass of large granules, at first straggling, but 



gradually becoming compact (fig. 8). This large solid columella is attached to the walls by 



short threads, which are the remains of the septa with here a slightly recovered radial 



symmetry. From the surface of the columellar tangle knobs of branching threads arise to 



form parts of a ring of pali. 



M 2 



