1040 MISS R. HAKRISON AND PROF. S. J. HICKSON ON 



septa ; but in C. striata there are only six primary septa, six 

 secondary septa, and twelve tertiary septa. The more recently 

 described species of this genus, C. gramdata and G. stylifera 

 (Dennant 7), agree with C. striata in the hexaradial arrangement 

 of the septa. In Conosmilia, moreover, the accretion ridges do 

 not appear to exist unless they are represented by the " beautiful 

 herring-bone ornamentation of the surface.'*' 



Text-fig. 221. 



C 



Diagrainiiiatic sketches of tlie septal arrangement of Pjjrophi/lUa iuflata. 



c, columella ; m.s., secondary' septa ; p.s.. primary septa. 



A. Arrangement of the septa just below the margin of the calyx. B. At the base 

 of the calyx. C. In the lower parts of the coral. (From Mem, Mauch, Lit. 

 Phil. Soc. 1910.) 



The columella of Conosmilia resembles Pifrophyllia in being 

 laminate and in this respect differs from Guyuia, in which the 

 columella is cylindrical. 



There has been a great deal of hesitation in giving the two genera 

 Giiynia and Conosmilia a definite i-esting-place in the system of 

 corals. 



Duncan * at first placed the genus Guyuia in the Order 

 Rugosa and in the family (^yathaxoniidte, but subsequently 

 removed it [15] to the family Turbinoliidse. Miss Ogilvie placed 

 it in her new family Amphiastraeida^ f. 



Duncan % at first placed the genus Conosmilia in the Order 

 Rugosa, family Stau^ridpe, but subsequently removed it to the family 

 Astrseidfe Simplices and placed it close to the genus Trochosmilia. 

 Miss Ogilvie placed this genus in the family Turbinoliidte. 



In my preliminary account of the genus, I remarked that " it 

 cannot be denied that Pyrophyllia has some characters reminiscent 

 of the extinct Rugosa," but on reconsideration I do not feel 



* Phil. Trans. K. S. 1872. f I'hil. Trans. 1896. 1 Phil. Trans. 1872. 



