268 BRITISH FOSSIL CORALS. 



5. Monttculipora ? Bowerbanki. Tab. LXIII, figs. 1, la, 15, 1c. 



Favosites spongites (pars), Lonsdale, in Murchison, Silur. Syst., p. 683, pi. xv bis, 



figs. 8c, 8d, 8e (cset. excl.), 1839. (Not the Calamopora 

 spongites of Goldfuss.) 

 Discopora squamata? Ibid., p. 6/9, pi. xv, fig. 23. 



Chjetetes? Boweebanki, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Paheoz. 



(Arch, du Mus., vol. v), p. 2/2, 1851. 



The general form of this coral varies much at different ages. In young specimens it 

 is massive, subspherical, and but slightly gibbose ; but in older specimens the tuberosities 

 appear to have risen up, so as to constitute cylindrical flexuous branches ; and in a very 

 large specimen these branches are ramose, very tall, numerous, and compose a coespitose 

 mass. The upper end of each of these branches is dilated so as to form a kind of round 

 head, the surface of which does not present any tubercles, and is occupied by closely set 

 subpolygonal slanting calices that are about one fifth or two fifths of a line in 

 diameter, and much resemble those of Alveolites, but are deprived of septal processes. 



From Much Wenlock, Benthall Edge, Dudley, Walsall, and, according to Mr. Lonsdale, 

 Hurst Hill, Sedgley. 



Specimens are in the Collections of Mr. Bowerbank, Mr. Fletcher, and M. de Verneuil. 



The ill-preserved fossil, from Desertcreat, which Mr. Portlock has represented under 

 the name of Favosites jjoli/moiyha, 1 appears to be referable to this species, which is 

 remarkable for the slight difference of size between its calices, the lozenge form of these, 

 and its general aspect. 



(). MoNTICULIPORA EXPLANATA. 



Nebulipora explanata, M'Coy, Ann. and Mag. of Nat. Hist., 2d series, vol. 6, p. 283, 



1850.— Brit. Palseoz. Foss., p. 23, pi. i c, fig. 6, 1851. 



" Corallttm forming very thin, irregularly expanded laminae, upwards of two inches 

 long, covered above with nearly regular, quincuncially arranged, flat or slightly depressed, 

 nebular clusters of larger tubes, about one and a half lines in diameter, and rather less 

 than twice their diameter apart (about twelve or fourteen cells between one centre and the 

 next) ; smaller intermediate tubes about six in one line. 



" Coniston limestone, Coniston, Lancashire ; limestone of Applethwaite Common, 

 Westmoreland." M'Coy, op. cit. 



1 Report on the Geol. of Londonderry, &c, p. 326, pi. xxi, fig. 2a. 



