92 



10.5, 8.5 and 6 m.m. In the defunct marginal part of tlie under surface there are 

 some smaller younger buds (diameter 1 to 3m. m.), which, however, have lost 

 their living parts. 



N". 600. Along the shorter diameter of the corallum a broad band of the upper 

 surface has lost its living tissue. In the living part some septa e.xhibit a more 

 energetic growth of the central part; however, new mouths could not be distin- 

 guished as yet. The parts of the margin of the under surface contiguous to the 

 defunct part of the upper surface had lost their soft portions, in their vicinity buds 

 had developed in the living tissue, five on one side and two on the other (Fig. 4). 

 These buds are less regular in form than those of N". 501 . Their stages of 

 development differ. The dimensions are: 13X8, 7.5X7, 4.5X4, 6X5.5, 5X4, 

 13.5 X S.5, and 10 X 7 m.m. They are fi.xed to the parent coral by a broad base. 

 The septa of the youngest buds, which are still little developed, are distinguish- 

 able from the spines of the costae of the mother-coral oy their flattened shape. 

 In (he basal parts of most of these buds the spines of the mother-coral are still 

 unaltered. In the destroyed part of the margin, with the five buds, a stemmed 

 buil has developed (diameter of the disc 4.5 m.m.. of the stem 3.5 m.m., height 

 3.5 m.m.). Besides these there are still remains of a number of smaller ones, 

 whose living tissue has, however, disappeared. 



N". 511. Only one third of the coral was covered by living tissue on the upper 

 surface as well as on the lower surface. In the defunct portion of the lower 

 surface a great many buds had arisen, most of which were still alive. The dia- 

 meter of these buds ranges from I to 3 m.m. 



N". 502. Of the upper surface only a small part of the margin was still covered 

 with living tissue; of the under surface almost one fourth was still alive. In this 

 part there are in the vinicity of the defunct region four large buds, only two of 

 which possess well-developed septa. The dimensions ai'e 10 X 7, 7X 6.5, 9.5 X 7.5. 

 and 10X9 mm. The buds are not yet stemmed, so that the basal parts of the 

 septa are still fixed over tlieir whole length to the skeleton of the mother-coral. 

 The septa of the youngest buds are distinguishable tiom the spines of the costae 

 of the mother-coral only by their flattened shape. Besides these large buds there 

 are at the margin, now surrounded by the destroyed region, two stemmed buds 

 with a disc, 3 and 2.5 m.m. in breadth. Moreover a few smaller ones are also 

 visible in the marginal part 



N°. 514. Upper surface without living parts. However, the tissues of a fourth part 

 had died off quite recently, the skeleton of this part still being little overgrown 

 with algae and other organisms, in contradistinction to the remaining part. At 

 the margin of the part that died off long ago some few young, stemmed buds 

 have developed, which however, have likewise lost their living tissue. The under 

 surface still possessed rests of living tissue beneath that portion of the upper 

 surface, which kept alive longest. Then follows a broad edge from which nearly 

 all soft parts had disappeared Here some large buds have developed (diameter 

 up to 6.5 m.m. I. Little is to be seen as vet of the skeleton In the remaining 

 part of the under surface, which had been defunct longer, the remains of many 

 small buds are visible, none of which were alive any more. 



N". 516. Upper surface devoid of living tissues in the margin a few short-stemmed 

 young buds. Under surface still covered with living tissue. In the margin a few 

 young buds of small dimensions, still completely encircled by living tissue of the 

 parent-coral. 



N". 513. Living tissues entirely disappeared from the upper surface; on the under 



