lii BRITISH FOSSIL CORALS. 



2. Genus Endopachys. 



(Pars) Lonsdale, Journ. of the Geol. Soc. of London, vol. i, p. 214, 1845. 



Corallum simple, free, and organized as in the preceding genus, but much compressed 

 towards its basis, which is carinate, and continued laterally into two vertical lobiform or 

 cristate expansions. Calice arched ; fossula long and narrow. 



Typ. sp., Endopachys Maclurii, Milne Edw. and J. Haime, Ann. Sc. Nat., vol. x, tab. i, fig. 1 ; Tar- 

 binolia Maclurii, Lea, Contrib. to Geol., tab. vi, fig. 206. 



3. Genus Balanophyllia. 



Searles Wood, Ann. and Mag. of Nat. Hist., vol. xiii, p. 11, 1844. 



Corallum simple and adherent, sub-pediculate, or sub-cylindrical, with a very broad 

 basis. Columella well developed, but not projecting at the bottom of the fossula. Septa 

 thin, and closely set ; those of the last cyclum well developed, and complete in number. 

 Costa narrow, crowded, and nearly equal ; no mural expansions. 



Typ. sp., Balanophyllia caliculus, Searles Wood, loc. cit. 



4. Genus Heteropsammia. 



Milne Edw. and J. Haime, Ann. Sc. Nat., 3 me serie, vol. x, p. 89, 1848. 



Corallum simple, adherent, and growing by its basis so as to cover completely the 

 shell on which it is fixed, and to assume the appearance of being free. Calice smaller 

 than the basal part of the corallum. Columella well developed. Septa thick, slightly 

 exsert, and closely set. Walls not having distinct costse, but presenting small striae or 

 small papillae, composed of minute granulse, and arranged in an irregular manner. 



Typ. sp., Heteropsammia Michelinii, Milne Edw. and J. Haime, loc. cit., p. 89. 



5. Genus Leptopsammia. 



Milne Edw. and J. Haime, loc. cit., p. 90, 1848. 



Corallum simple, adherent. Calice elliptical. Columella much developed, and 

 projecting at the bottom of the fossula. Septa neither exsert nor crowded, very thin, and 

 presenting scarcely any granulations ; those of the fifth order rudimentary. Walls thin and 

 translucid. Costa distinct from the basis, and formed by series of small granulse. 



Typ. sp., Leptopsammia Stokesiana, Milne Edw. and J. Haime, loc. cit., tab. i, fig. 4. 



6. Genus Endopsammia. 



Mdne Edw. and J. Haime, loc. cit., p. 91, 1848. 



Corallum simple, erect, and adherent. Calice circular. Columella much developed, 

 bat not projecting. Septa thick, strongly granulated, and slighty exsert, forming four 

 cycla, the last of which is almost rudimentary. Walls covered with an indistinct pellicular 

 epitheca, and having broad, straight costse. 



Typ. sp., Endopsammia Philippensis, Milne Edw. and J. Haime, loc. cit., tab. i, fig. 5. 



