CORALS FROM THE SILURIAN FORMATION. 275 



parts of the same specimen, and sometimes also in different specimens, we have observed 

 the intermediate form between this state and the fasciculated structure peculiar to 

 Syringopora. 



3. Syringopora serpens. Tab. LXV, figs. 2, 2a. 



Madrepora tubulis, &c, Fougt, Amsen. Acad., vol. i, p. 105, tab. iv, figs. 22, 26, 1749. 

 Tobipora serpens, Linne, Syst. Nat., edit. 12, p. 1271, 1767. 



— — Othon Fabricivs, Fauna Groenl., p. 428, 1788. 



Catenipora axillaris, Lamarck, Hist, des Anim. sans Vert., vol.ii, p. 207, 1816; 2d 



edit., p. 322. 



— — Lamouroux, Exp. Meth., p. 66, 1821. 

 Tubiporites serpens, Kriiger, Gesch. der Urw., p. 263, 1823. 

 Catenipora axillaris, Lamouroux, Encycl. (Zooph.), p. 177, 1824. 



Aulopora conglomerate., Lonsdale, in Murchison, Silur. Syst., p. 675, pi. xv, fig. 3, 



1839. (Not Goldfuss.) 



— Lonsdalei, TfOrbigny, Prodr. de Paleont., vol. i, p. 51, 1850. 

 Syringopora serpens, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palseoz., 



p. 294, 1851. 



Young specimens of this coral equally resemble Aulopora ; by the progress of age and 

 the multiplication of individuals, the corallites become very tall and closely set. LJpitheca 

 strong. Walls thick. 18 septal stria. Connecting tubes few in number. Diameter of 

 the corallite somewhat more than half a line. 



Dudley and Benthall Edge. Gothland. 



Specimens are in the Collections of Mr. Fletcher, of the Museum of Paris, &c. 



This species differs from the preceding ones by the large size of its corallites, the 

 irregular way in which they are set, and the extreme rarity of the connecting tubes. 



Syringopora Lonsdaleana} which Professor M'Coy found in the Silurian beds of 

 Portrane and Mahahide, county of Dublin, is evidently distinct from the three Silurian 

 species here described, but is so imperfectly known that it appears difficult to characterise 

 it. The corallites are large, straight, and irregularly placed. The connecting tubes are 

 large, and appear'to be very short. 



Syringopora caspitosa, Lonsdale, in Murchison, Silur. Syst., pi. xv bis, fig. 13 (not 

 Goldfuss) ; Harmodites Lonsdalei, D'Orbigny, Prodr. de Paleont., vol. i, p. 50 ; is a 

 coral from Wenlock, which is entirely unknown to us, and seems not to belong to the 

 genus Syringopora. 



1 M'Coy, Syn. of Sil. Foss. of Irel., p. 65, pi. iv, fig. 20, 1846. 



