the Collection of the British Museum, 421 



prominent upper edges of the cells, and the nearly total obli- 

 teration of the septa. 



Hah. Singapore (M.-Edwards) ; China (B.M.). 



10. 8eriatopo7'a stricta. B.M. 



Corallum fasciculate, in general outline hemispherical. 

 Branches subterete, straight, subulate, moderately crowded, 

 divaricate, coalescing at their bases ; angle of ramification, on 

 the average, 60°. Calicles large, on the greater part of the 

 corallum almost entirely irregularly dispersed, circular, im- 

 mersed, their edges on the same level, equally and slightly 

 prominent ; those of the terminal branches in distinct but ill- 

 defined rows, moderately crowded, average distance about 

 three fourths of their diameter, rather oblong, vaulted, their 

 edge coarsely fimbriate, and in its upper part strongly labiate. 

 Septa entirely obsolete. Columella moderately developed, 

 linear, compressed. Surface of coenenchyma densely and 

 delicately spinulous, becoming more coarsely echinulate and 

 at last granulate towards the base. Diameter of calicles 

 1 millim. 



Hah. Cape of Good Hope. 



Differs from most of its congeners in the irregular disposi- 

 tion of the calicles, in which respect it agrees most with S. 

 elegans. From this, however, as well as from the other 

 species, it is distinguished by numerous characters. 



11. Seriatopora spinosa. B.M. 



MiUepora " lineata,^'' Forskal ; Esper. 

 Seriatopora " suhulata,''^ Ehrenberg ; Daua. 

 Seriatopora spinosa, M.-Edwards. 



This, again, is an easily recognizable and well-defined 

 species, distinguished at the first glance by its angular and 

 verrucose branches : this aspect is produced by the broad and 

 flat interspaces between the rows of calicles, the latter being 

 much crowded in each row and strongly projecting. 



J am not aware that this species has been found anywhere 

 else than in the Red Sea, where it was first discovered by 

 Forskal, who gave a good description of it. 



12. Seriatopora ocellafa. 

 Seriatopora ocellata, Ehrenberg ; M.-Edwards. 



Were it not for the larger calicles, I should without hesita- 

 tion declare this species (which was established on a worn 

 fragment from an unknown locality) to be identical with S. 

 spinosa. 



Ann. & Mag. N. Hist. Ser. 4 Vol. xix. 29 



