CORALS FROM THE DEVONIAN FORMATION. 333 



4. Genus Endophyllum.i 



1. Endophyllum Bowerbanki. Tab. LIII, fig. 1. 



Endophyllum Bowerbanki, Milne Edwards and Jules Haime, Pol. Foss. des Ter. Palseoz., 



p. 394, 1851. 



Corallum composite, astreiforra. Corallites more or less intimately united together 

 by rudimentary exterior walls and an irregular vesicular tissue. Inner walls well con- 

 stituted, circular, and often double. Principal septa (30 or 32) pretty well developed, rather 

 slender, very flexuous inwardly, extending almost to the centre of the calice, and alter- 

 nating with an equal number of smaller septa. They do not project much outside the 

 wall, so as to form costal striae, that soon disappear in the vesicular tissue. Tabula 

 well developed and somewhat irregular. Diameter of the mural circles about 8 lines, 

 distance between them 5 or 7 lines. 



Found at Barton near Torquay. 



In the Collections of Mr. Bowerbank, Dr. Battersby, &c. 



The Genus Endophyllum has been established since the pubhcation of the Introduction 

 to this Monograph, and is intermediate between Cyathophylliim and Acervularia, having 

 most of the structural characters of the first, but presenting completely vesicular tissue 

 exteriorly to well-defined walls. In Acervularia there is a well-developed epitheca, which 

 does not exist in Endophyllum, and the septal system is much more developed in the 

 space between the two mural investments. 



Endophyllum Bowerbanki differs from E. abditum" by its outer walls being rudimentary, 

 its inner walls being well constituted, and its septa thicker though still rather slender. 



2. Endophyllum abditum. Tab. LII, fig. 6. 



Endophyllum abditum, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palaeoz., 

 . p. 394, 1851. 



Corallites more or less closely united by polygonal walls, which are rather strong. 

 Inner walls thin, often double and rather irregularly circumscribed. The space comprised 

 between the two walls is filled with large vesicles, on which some costal striae may be 

 recognised. Principal septa (34 to 40) very slender, especially inwardly, where they 

 become much curved, an equal number of smaller septa alternating with the principal 

 ones. Diagonal of the large calices almost 3 inches ; diameter of the mm-al circle about 

 13 lines. 



' Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palaeoz. ; Archives du Museum, vol. v, p. 393, 

 1851. 



^ Tab. lii, fig. G. 



