Smyth — The Carboniferous Coast- Section at Malahidc. 21 



discontinuity. Any intermediate state may occur, and the extremes may be 

 shown by closely contiguous sections of one individual. The outer area is 

 usually more developed on one side, and may be entirely absent from the other. 



Transverse section, young. — Only major septa present, not reaching 

 the centre, sometimes very short. No outer area. Cardinal septum may be 

 shorter than the rest. 



Longitudinal section. — Tabulae close, wide, and flat, bent down at the side, 

 where they meet the marginal vesicles. 



Comparisons. — This coral closely resembles the Upper Devonian E. pris- 

 cum, Miinster, as figured by Frech.^ The latter differs from our form in 

 having minor septa on its inner wall, and in its more regular habit. 



From JE. hurringtonense, Vau,^ the present species differs in the absence 

 of the peculiar grouping of the septa in that form, and in the smaller 

 development of minor septa. 



Vaughan records his species from Malahide, but 1 have only found the 

 form described above. 



It is interesting to compare — 



Endophyllum irregulare, sp. nov., Ci, Malahide. 

 Thysanophyllum })seudovermiculare, McCoy, C1.2, N.W.P.' 

 Endophyllmri cf. pseudovermiculare, Vaughan, lower S, Belgium,* 



Lophophyllum cf. costatum, McCoy. (PL I, fig. 6). 

 M13 = Ci. 



Description. — Only two imperfect specimens were found, and transverse 

 sections alone obtained. Transverse section : — Diameter of calyx, 10'5 mm. ; 

 major septa, 23 in one specimen, 20 in the other, reaching about half way to 

 the centre. Minor septa barely indicated at rim of calyx. Cardinal septum 

 shorter than the rest. Septa in cardinal quadrants thickened so as to be 

 in contact. Tabular intersections, 3 or 4. Columella continuous with counter 

 septum, very slightly thickened, with 4 to 6 rudimentary lamellae on each 

 side. In the calyx the columella forms a strongly thickened boss, oval in 

 section, 4 x 2'5 mm. One row of vesicles occurs on the calyx wall. 



Comparison. — This coral may well be a precursor of that described by 

 Wilmore as Lophophyllum costatum, McCoy, ^ from D3 of the Midlands 



' Zeitsch. Deutsch. Geol. Gesellsch., vol. xxxvii, 1885, p. 76, PL vii, fig. 2, and PI. x, 

 fig. 2. 



2 Reynolds and Vaughan, Q. J. G. S., vol. Ixvii, 1911 ("Burrington Paper"), p. 377, 

 and PI. XIX, fig. 4. 



= Garwood, Q. J. G. S., vol. Ixviii, 1912, p. 562, and PL xlix, fig. 2. 



* Q. J. G. S., vol. Ixxi, 1915 (" Belgian Paper "), p. 39, and PL v, fig. 3. 



s Q. J. G^ S., vol. Ixvi, 1910, p. 573, and PL xl, figs. 1-4. 



