Vol. 65.] CARBONIFEROUS LIMESTONE OF COUNTT CLARE. 579 



Cami-ophyllum sp. (PI. XXVII, fig. 10.) 



Description. — External characters : form cylindrical and 

 curved ; epitheca strong, with longitudinal costee. 



Horizontal section. — Outer wall strong. A peripheral vesi- 

 cular zone is almost entirely absent. 



Major septa about 35 in number, short and never extending far 

 towards the centre. Minor septa rudimentary. The median area 

 is occupied solely by the tabulae, which are remote and extend to the 

 wall. There are no interseptal dissepiments, though intersections of 

 downwardly curved tabulae are seen uniting the septa. A pro- 

 nounced septal fossula is visible. 



Discussion. — The characters of this species seem to warrant 

 its inclusion in the genus Calophyllum of Dana, which constitutes 

 a group of corals distinguished, on the one hand from Amplexus 

 chiefly by the presence of a series of minor septa, and on the other 

 from Campophyllum by the absence of a vesicular outer zone. It 

 is well known, however, that in many instances the latter is a 

 senile character, merely denoting a comparatively late stage in 

 the life-history of a coral ; and it must, therefore, be admitted that 

 its presence or absence is a matter of little importance in classi- 

 fication, and can hardly furnish sufficient grounds for the distinction 

 of the two genera. 



This species has a very feebly developed vesicular zone, and it 

 thus seems to furnish a connecting link between Calophyllum clanai, 

 Thomson l and Campophyllum caninoides, Sibly. 2 



Caninia. 



Canlnia cornucopia, Mich. (PI. XXVII, fig. 14.) 



As interpreted by Mr. R. G. Carruthers, Geol. Mag. dec. 5, vol. v (1908) 

 p. 160 & pi. vi. 



This species, which frequently presents the peculiar contorted 

 form figured by Carruthers (op. cit. diagram E), is abundant 

 throughout Z 2 , attaining its maximum at Horizon y. It also occurs 

 sparingly near the base of S x , but has not been recorded from the 

 massive limestones of the Syringothyris Zone. 



Caninia aff. cornucopia, Mich. (PL XXVII, fig. 12.) 



A form closely related to the above occurs in some abundance in 

 the topmost beds of the limestone (D,_ 3 ) in County Clare. Its chief 

 distinguishing features are its cylindrical habit, inconspicuous septal 

 fossula, and greater number of tabular intersections. 



A similar mutation has been recorded by Dr. Vaughan from 

 D 2 _ 3 of the South- Western Province, and by Dr. Sibly from D 3 of 

 the Midlands. 



1 Proc. Roy. Irish Acad. ser. 3, vol. ii (1893) p. 687 & pi. xv, fig, 1. 



2 Quart. Journ. Geol. Soc. vol. lxii (1906) p. 368 & pi. xxxi, fig. 2 5. 



