36 BRITISH FOSSIL CORALS. 



seven lines ; long axis of the calice, three lines and a quarter ; short axis, two lines • depth 

 of the fossula, two lines. 



This species belongs to the section of the fixed Balanophylliae, and is consequently 

 easily distinguished from B. pralo?iya} and B. Gravesii? which are only sub-pedicellate. 

 The nakedness of the wall, and quite rudimentary state of the epitheca, distinguishes it 

 also from B. calyculus, 3 B. verrucaria, 4 " and B. cylindrical In B. yeniculata 6 and 

 B. Cumingii 1 there are but four cycla of septa, whereas in the above-described fossil there 

 are five cycla. It differs from B. italica* by its elongated and compressed form, from 

 B. Bairdiana by its exsert septa, and from B. tenuistriata by the compressed form of its 

 lower part, and the thickness of its principal costa. It resembles most this last-mentioned 

 species, which belongs to the Calcaire grossier of the Parisian basin. 



Balanopliyllia desmophyllum is found at Bracklesham Bay, and has been communicated 

 to us by Mr. Dixon and Mr. Frederick Edwards. 



3. Genus Dendrophyllia (p. liii). 

 Dendrophyllia dendrophylloides. Tab. VI, figs. 2, 2a, 2d, 2 c. 



Oculina dendrophylloides, Lonsdale, in Mr. Dixon's manuscript work on the Chalk 



Formations and Tertiary Deposits of Sussex. 



Dendrophyllia dendrophylloides, Milne Edwards and J. Haime, Ann. des Sc. Nat., 



3 me serie, vol. x, p. 102, 1848. 



Corallum composite, appearing usually to have incrusted the stem of some marine 

 plant which has been destroyed during the process of fossilization. Gemmation irregular. 

 Corallites short, very unequal in size, rather closely set, united by their basis, and free 

 down to a variable distance from the calice, so as to project more or less on the surface of 

 the common mass, or even to form a certain number of somewhat ramified branches (fig. 2). 

 Costce delicate, numerous, closely set, almost equal in breadth, composed of a row of 

 irregular, conical granulse, having a sub-vermiculate appearance, and becoming more 

 irregular and more flexuous in the parts where they unite with those of neighbouring 

 corallites (fig. 2 b) . Mural pores large, and very distinct near the calice, but ceasing to be 

 so lower down, where the tissue of the wall becomes very compact. Calices regularly cir- 

 cular, with the edge rather thin, and the fossula infundibuliform, but not deep. Columella 

 spongiose, not much developed, and appearing to be but slightly prominent at the bottom 

 of the fossula. Sepia forming four complete cycla, and sometimes a rudimentary incomplete 

 fifth cyclum ; very thin, unequal, not exsert, or only very slightly so, and granulated 



1 Michelin, Icon., tab. ix, fig. 2. 2 Michelin, Icon., tab. xliii, fig. 7. 3 See tab. i, fig. 3. 



4 Milne Edwards and J. Haime, Ann. des Sc. Nat., 3 rae serie, vol. x, tab. i, figs. 6, 6 a. 



5 Michelin, op. cit., tab. viii, fig. 15. 



6 D'Archiac, Mem. de la Soc. Geol., 2 me serie, vol. ii, tab. vii, fig. /. 



7 Milne Edwards and J. Haime, loc. cit., fig. 8. 8 Michelin, loc. cit., tab. ix, fig. 15. 



