238 PROFESSOB P. M. DUNCAN ON THE 



Cartophyllia pourtalesi, Duncan. Trans. Zool. Soc. viii. p. 317. 



This species was described and figured in the former communication to the Zoolo- 

 gical Society ; and some specimens, which were not examined formerly, are now noticed, 

 in order to explain some points of structure and its distinctness from some other 

 species. 



The pali in the fully developed corallite are well developed when the columella has 

 only one twist, and are less so when this structure is more complicated ; and this 

 peculiarity has been noticed by Pourtales in Garyophyllia formosa, Pourt. The pali 

 are thin and long, but not high ; and they are placed before the third cycle of septa, 

 being absent when the fourth and fifth orders are incomplete. 



The species has, in external form, some resemblance to Caryopkyllia cornuformis, 

 Pourtales, and also in the costal arrangement ; but this last species has four complete 

 cycles of septa, and the pali are only placed before the secondaries, making it a very 

 marked and peculiar member of the genus. 



In order to establish the species Caryophyllia pourtalesi, I have again delineated some 

 parts of the specimens, to show the relative size of the costse and septa, and the size of 

 the pali (Plate XLIII. figs. 1-7.) 



Young specimens of the species : — 



A young specimen was figured in the former essay (plate xlii. figs. 4-7) ; and I append 

 the following remarks on another. 



The young specimens, like the old, show that they were attached by a round base, 

 which was fractured by the dredge. In the earliest stage there appear to be six 

 primary septa, which are curved, united in two instances, formed of two lamiuEE, 

 and united to a trabecular columella. Then a small secondary is found between 

 each of them. At this stage the epitheca, which comes eventually to be beautifully 

 granular, is readily separable from the costa3 beneath, which are curved (Plate XLIII. 

 figs. 11-14). 



As the coral grows, the third cycle appears, and rapidly becomes complete. The 

 septa are wide apart, reach far inwards, and have large papilla-like granules on their 

 sides. The pali are not distinguishable in specimens ^^ inch in height ; but there are 

 processes of the single columella which evidently are in relation with the secondary 

 septa, where the tertiaries are complete in a system. 



Caryophyllia inskipi, nobis. 



This species was described in the first part of this essay (Trans. Zool. Soc. vol. viii. 

 p. 316), but it was not delineated. A figure is now given; and the remarkably deep- 

 seated columella, tall pali, and externally thick septa will be noticed (Plate XLIII. 

 figs. 8-10). 



