CORALS FROM THE MOUNTAIN LIMESTONE. 207 



Mr. Lonsdale the name of Strombodes ; the zoological value of which had been previously 

 fixed in a manner quite different by Schweigger and by Goldfuss, and he has at the same 

 time given the name of Lonsdaleia to a new division comprising the corals which do not 

 differ from his ill-denominated Strombodes by their structure, but are only fasciculate and 

 not coalescent. This latter distinction does not appear to us advisable, and in order not to 

 augment without necessity the number of generic names applied to the same objects, we 

 have employed the name of Lonsdaleia in a wider acceptation, and made it equivalent to 

 the Lithostrotion of Mr. Lonsdale, and to Lonsdaleia and Strombodes of Professor M'Coy. 

 Lonsdaleia floriformis is easily distinguished from L. rugosa} and L. duplicate? by the 

 disposition of its corallites to coalesce completely. It differs from L. Bronni* by the 

 unequal development of its septa, and from L. papillata* by its columella being larger and 

 more prominent, and by the part of the corallites situated near the exterior wall not being 

 entirely vesicular. 



2. Lonsdaleia papillata. 



Cyathophyllum papillatum, Fischer, Oryct. de Moscou, p. 155, pi. xxxi, fig. 4, 1837. 

 Column aria Troosti, Castelnau, Ter. Sil. de l'Amer. du Nord., pi. xix, fig. 2, 1843. 

 Lithostrotion floriforme, Lonsdale, in Murch. Vern. Keys. Russ. and Ur., vol. i, p. 609, 



figs, a, b, c, 1845. (Not Fleming.) 



— emarciatum, Ibid., p. 603, figs. a,f. 



— floriforme, Keyserling, Reise in Petschora, p. 154, tab. i, fig. 1, 1846. 



(Synonymis exclusis.) 

 Strombodes emarciatum, M'Coy, Ann. and Mag. of Nat. Hist., 2d ser., vol. iii, p. 136, 



1849. 

 Lithostrotion floriforme, D'Orbigny, Prod, de Pal., vol. i, p. 159, 1850. 

 Lonsdalia papillata, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palaeoz., 



p. 460, pi. xi, fig. 2, 1851. 

 Strombodes emarciatum, M'Coy, Brit. Palseoz. Foss., p. 103, 1851. 



Corallum massive ; upper end of the corallites polygonal, often tetragonal, with simple, 

 thin edges ; exterior zone almost flat ; calicinal fossula rather large and deep. Columella 

 not very prominent, somewhat attenuated upwards, and bearing laterally subvertical, 

 oblique, slightly curved ridges. Principal septa 22 or 24 in number, thin, not extending 

 quite to the columella, and alternating with an equal number of small ones. Great diagonal 

 of the corallites, in general, about 8 lines. Diameter of the walls 3| or 4 lines. 



A vertical section shows that the inner walls are slender, but very distinct, and formed 

 by the inner edge of the vesicles of the exterior zone, which are somewhat unequal, strongly 



1 See tab. xxxviii, fig. 5. 



2 Lonsdalia erassiconus, M'Coy, Ann. and Mag. of Nat. Hist., s. 2, vol. iii, p. 12. 



3 Milne Edwards and Jules Haime, Polyp. Foss. des Terr. Palaeoz., p. 459, tab. ii, fig. 1. 



4 Ibid., p. 460, tab. ii, fig. 2. 



