1867.] DUXCAX A>s'D THOilSOX CTCLOPHYLLrM. 329 



endotheca which forms a groove ; one portion of the endotheca 

 surrounds the central mass and sends a process into the fossula, and 

 the other is reflected between the septa. 



The septa which arise from the wall are alternately long and 

 short, the shorter being attached to the longer by a yery regular 

 endotheca, which is yesicnlar in longitudinal sections. The septa 

 are not exsert, and do not project much in the calice ; but in transverse 

 sections they are seen to end at the groove, to be rarely quite straight, 

 and to form a fossula by three of them being rudimentary. The 

 septa are about 140 in number in a corallum 1 J^ inch in diameter. 

 The small septa of the central mass are about 144 in number, and 

 they unite to form about 40 large septa. The endotheca between the 

 large septa is curved, and between the small and other septa of the 

 central mass it is very vesicular. The endotheca of the columella 

 is very delicate and vesicular. The height of the corallum is several 

 inches. 



2. Cyclophylliim ptjxgites. pi. XIII. figs. 4-8. 

 Turhinolia fungites, Fleming. 

 Aidojphyllum fungites, Edwards and Haime. 



The corallum is cylindi'O- conical, curved, and cornute, and marked 

 with circular enlargements ; the calice is wide and deep, and presents 

 a central projection, which has an encircling endotheca, many small 

 and a few large septa. The columella is essential ; and the lamellae 

 are close, irregular, and joined by much endotheca. 



The septa springing from the wall are alternately large and small ; 

 there is a fossula, and the endotheca is greatly developed. There 

 are about 120 septa; and the central mass has about 80 small septa. 

 The height of the corallum is several inches. 



The shape of the corallites is very constant, and is the great sj^ecific 

 distinction. 



The foldings of the endotheca to form the lining of the interseptal 

 spaces of the central mass are very distinctive of the genus. This 

 central structure disting-uishes the genus from all others, except 

 Aidophyllum, in which the mass is less prominent and the columellary 

 space in it is filled up with dehcate and close tabulae. 



3. Description of the species of Aulophyllum : — 

 AiTLOPHYLLTJii Edwaedsi, spcc. nov. PL XIII. fig. 8. 



The corallum is cylindro- conical and cornute in shape. The 

 calice is wide, not very deep, and the central mass is not very pro- 

 minent. The septa of the wall are alternately long and short, very 

 numerous, probably 160 in number. The columellary space, encircled 

 by the septa of the central mass, is occupied by very close tabulae. 

 Height of the corallum 1 inch. Locality, Bathgate. 



4. The geological position of the Cordis. — In aU the localities 

 where these corals have been found, namely at Brockley, Lesmaha- 

 gow, Dunlop, Beith, and Bathgate, there are many fossils associated 

 wilh them. Amongst the corals there are : — 



