63 

 ii. Balanophyllia tenuis nov. spec. (Plate VII, fig. 8). 



Stat. 96. South-east side of Pearl-bank, Sulu-archipelago. Depth 15 meter. 1 ex. 



Corallite conical; the base is broken off. There are a few winglike expansions covering 

 other objects connected with the theca. On one of these expansions a young bud is attached ; 

 an older bud is connected with the main corallite by an other expansion ; the broken off base 

 of this bud projects at the underside in the same way as that of the main corallite. The wall 

 is perforated only near the calicular margin. There are neither epitheca nor ribs. The wall is 

 somewhat angular, and the projections correspond with the septa of the first and second cycle. 

 It is covered by irregularly scattered, fine, pointed, sometimes needledike granulae. The heio-ht 

 of the corallite is 2 cm., the diameter of the broken off base is 4 mm. and that of the 

 elliptical calicle 9 X 7-5 mm.. The calicles of the buds are round. 



The septa are arranged in four cycles. Those of the first cycle are much exsert, those 

 of the second cycle to a less extent. They have the same shape, though those of the first cycle 

 are broader. The septa are spongy near the calicular margin. The septal faces are covered by 

 a few granules. The septa of the foürth cycle are much broader than those of the third one. 

 They join together about halfway between the margin and the columella. All septa have the 

 edge entire, but those of the higher cycles are more granular on the sides than those of the 

 first and second cycles. 



The columella is rather well developed, its length being one-third of that of the calicle. 

 It is trabecular and not prominent. The depth of the calicle is about half its length. 



12. Balanophyllia regularis (Gard.). 



Thecopsammia regularis Gardiner 1898. 

 Stat. 213. Zuid-Eiland near Saleyer. 30 ex. 



These specimens correspond in all respects with the description and figure given by 

 Gardiner, save that some specimens increase in diameter from the base upwards. 



13. Balanophyllia cumingi M.-Edw. et H. 



Balanophyllia cumingi Milne-Edwards et Haime 1848. 

 Balanophyllia cumingi Milne-Edwards 1860. 

 Balanopliyllia cumingi Bourne 1905. 

 Balanophyllia cumingi Bedot 1907. 



Stat. 257. Du-roa-strait, Kei-islands. Depth till 52 meter. 1 ex. 



This is a young specimen of 9 mm. height. No septa of the fifth cycle have developed. 

 According to Verrill (1864) the Dendrophyllia scabrosa Dana is synonymous with this species. 

 It may be right but the description given by Dana is rather insufficiënt. 



14. Balanophyllia elongata (Mos.). 



Thecopsammia elongata Moseley 1 SS 1. 



Stat. 289. 9°o'.3S., I26°24'.5E. South-coast of Timor. Depth 112 meter. 1 ex. 



"5 



SIBOGA-EXPEDITIE XVI c. Q 



