160 R. G. Carruthers — A Revi^iion of some Carboniferous Corals. 



1850. Ainplexns cornu-bovis, M.-Ed. & II. : Pol. Foss. Terr. Pal., pi. ii, figs. 1-16 



aud Ic. 



— Lophoplt>jlltim Damoiiti, ibid., p. 350, pi. iii, figs. 3, 3«. 



— Cyathopsis cornu-bovis, A. d'Orb. : Prod. Pal. Univ., t. i, p. 105. 

 1852. Amplexus ,, M.-Ed. & H. : Brit. Foss. Cor., p. 174. 

 1854. ,, ,, J. Morris : Cat. Brit. Foss., p. 46. 



1857. ,, ,, Pictet: Traite d. pal., t. iv, p. 452, pi. 107, 



figs. 17a-17c. 



— Lobophijllum Dmnoitti, ibid., t. iv, p. 453, pi. 108, fig. 18. 



1860. Lophophyllnm ,, M.-Ed. : Hist. Nat. d. Cor., t. iii, p. 353. 



— Amplexus cornu-bovis, ibid., p. 349. ' 



1861. LophophyUitm Bumonti, de Froraentel : lut. a I'et pol. foss., p. 290. 

 1872. Amplexus ibicinus, de Kon. : Xouv. Eecber. sur. Auim. Foss. d. Terr. Carb. 



d. 1. Belg., p. 67, pi. vi, figs. 2, 2a. 



— ,, cornu-arietis, ibid., p. 72, pi. vi, figs. 4, 4rt. 



— Zaphrcntis cornueopiee, ibid., p. 100, pi. x, figs. 5-ob, and pi. xv, fig. 2. 

 — ■ ,, vermicularis, ibid., p. 95, pi. x, figs. \-\d. 



— ,, Nystiana, ibid., p. 103, pi. x, figs. 8-8«. 



— ,, Edwardsiana, ibid., p. 83, pi. vii, figs. 4-4 J. 



— Lopliophyllum {?) Dumonti, ibid., p. 55, pi. iv, tigs. 4, 4a. 



External Chaeacteks. 



Corallum very variable in shape. "When growth is regular (PI. VI, 

 Fig. 1) the base is strongly curved and conical, the coral becoming 

 more cylindrical as growth proceeds. Most of the examples from 

 Tournai only show the commencement of the cylindrical stage, fully 



Diagram E. — Outlines of Caninia cornueopiee, Mich., showing unusual habits of 

 growth. All half natural size. Tournai. Geol. Survey Coll. Figs. 1-6. 

 E.G. 341-346 respectively. 



grown specimens being comparatively rare. Exceptions to such 

 regular growth are frequent ; the coral may either expand con- 

 tinuously to its maximum diameter (about 3 cm. ) or remain narrow 

 for a considerable length, abruptly expanding and contracting as 

 growth proceeds. Such specimens are often contorted in a remark- 

 able manner ; some curious examples are given in outline in 

 Diagram E. 



The epitheca is of medium thickness, smooth, with numerous fine 

 annular striations; constrictions of growth are frequent, not un- 

 commonly amounting to an interruption in the continuity of the 



