CORALS FROM THE DEVONIAN FORMATION. 241 



A vertical section shows that the intercostal loculi are filled up with vesicles, which 

 are very small and pretty regular. The dissepiments of the interseptal loculi are almost 

 horizontal, and unite at the centre of the visceral chamber so as to form a series of small 

 and very closely set tabula. 



Found at Torquay, Plymouth, and Newton. 



In the Collections of Mr. Bowerbank, Dr. Battersby, and Mr. Pengelly. 



S. Fengelli^ differs from the above- described species by its septa being more numerous 

 and its walls rudimentary. 



In 8. Bowerbanld' the septa are less numerous and more vermiculate. 



In 8. Boloniensii the calices are smaller, and costal radii completely confluent. 



2. Smithia Pengellyi. Tab. LV, fig. 1. 



AsTEEA HENNAHii, (pars), Lonsdale, in Sedgwick and Murchison, Geol. Trans., 2d ser., 



vol. V, 3d part, p. 697, pi. Iviii, fig. 3a, 1840. 

 Smithia Pengellyi, Milne Edwards and Jides Haitne, Pol. Foss. des Terr. Pal., p. 422, 1851. 



Mural circles not very distinct, and indicated principally by a slight thickening of the 

 septa, which are placed at very unequal distances. Costal radii (not more than 40) 

 alternately unequal in thickness, granulated laterally ; in general larger and more confluent 

 in one direction than in the other, where they are flexuous and even angular ; half of them 

 do not extend further than the wall ; the others become somewhat thicker on that part, 

 and, passing on, become very slender towards the centre of the visceral chamber, where 

 they bear paliform appendices. Diameter of the mural circle 2 lines, or somewhat more. 

 Dissepiments very closely set. 



Found at Torquay and Plymouth. 



In the Collections of the Geological Society, Mr. Bowerbank, Dr. Battersby, and 

 Mr. Pengelly. 



This species differs from the preceding one by its septa being more numerous, thicker, 

 and closer set. It is also well characterised by its walls being rudimentary. 



3. Smithia Bowerbanki. Tab. LV, fig. 2. 



Smithia Bowerbanki, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palaeoz., 



p. 423, 1851. 



Mural circles well developed, and placed very widely apart, but at unequal distances. 

 Costal radii (18 or 20) completely confluent, slender, larger, and straighter in one 

 direction than in the other, but in general flexuous and vermiculate (the more so as they 



1 Tab.lv, fig. 1. 2 Tab. iv, fig. 2. 



3 Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palaeoz., p. 423, 1851. 



