ON SECTIONS OF MOUNTAIN-LIMESTONE CORALS. 43 



Campojjhyllum -with Cijathophyllum and Zephrentls cylindr'ica, we cannot 

 see any good grounds for these forms being placed in separate genera. Tho 

 tabula and endotheca are very similar in all the three forms. 



Plate II. presents important structural confirmations. Fig. 1, Cijatho^ 

 XyhijUum Wrirjhtl. Eigs. 3, 10, & 13 are closely allied to Cijathophyllum, 

 and probably may form a subgenus. They are all restricted to the 'lower 

 beds, and are found at Brockley, Lesmahagow, and at Howret, Ayrshire 

 Figs. 2, 4, 6, 7, 8, 9, 11, 12, 14, 15, & 16 have close affinities to tho 

 genus Clisiophyllum (Dana), but there is a distinctly marked difference in 

 the structural characteristics from those of any known species. AU are 

 restricted to the lower members of the period, and are found at Brockley 

 Lesmahagow. ' 



Plate III. contains seven varieties of the genus (JlislophiiUum (Dana). This 

 genus is characterized by the conical boss in the centre of the calice, and by 

 the central line which passes down from the apex of the cone to the inferior 

 extremity. Pigs. 1, 3, & 4 have close affinities to fig. 6, which represents 

 C. hpartitum (M'Coy), while there is a distinctly marked difference in 

 structural characteristics. Figs. 2, 5, & 7 differ very materially from tho 

 others, and cannot be referred to any named species. They are all found in 

 the lower members of the period at Beith, Ayrshire. 



Plate IV. contains five varieties. Fig. 5, CUsiophyllum coniseptum (Key- 

 serling). This is the only named species represented on this Plate. Figs. 

 1, 2, 3, & 4 differ very materially from any existing genus ; they are not 

 only restricted to tho lower members of the period, but also to a very 

 limited area of the period. They have only been found at Treahorn, near 

 Beith, Ayrshire. 



Plate V. fig. 4 has close affinities to ClisiophyUum coniseptum. Fig. 1 

 has a clear generic distinction from all the others found that have passed 

 through our hands. This coral we have found 10 inches in height, and fi-e- 

 quently 2 inches in diameter. It is the largest form of this class we have 

 yet seen. Figs, 4 & 5 are closely allied to figs. 1 & 4 of Plate IV. These, 

 like the former, are aU restricted both in vertical range and in area. Thev 

 have only been found at Treahorn, near Beith, Ayrshire. 



Plate VI. figs. 1, 2, & 5 are three varieties of the genus ClisiophyUum 

 (Dana), but they cannot be referred to any existing species with which we 

 met. They are restricted both in vertical range and area. They are only 

 found at the base of the rocks of this period, and are met with at thirdpart 

 near Beith, Ayrshire. Figs. 3 & 4 show a distinctly marked difference in 

 the essential characteristics from any known genus. They are found in the 

 lower beds at Brockley, near Lesmahagow, and at Treahorn, Beith Ayr- 

 shire. •' 



__ Plate VII. contains varieties of Cychpliyllum (Duncan & Thomson). 

 Fig. 6 represents a section of the original fwujitus of the Eev. David Ure • 

 It IS figured in his 'History of Eutherglen 'and Fast Kilbride,' in 1793* 

 The original specimen is in the collection of the Eoyal Society of Edinbui-gh 

 By permission of the Council, we sliced that specimen with a view to ascer- 

 tain to what genus it could be referred. The history of this specimen is 

 perhaps one of the best iUustrations on record showing the necessity of 

 carefuUy working out the details of fossil corals before they receive either 

 generic or specific names. It was named fum/itus by Ure in 1793 Turbi- 

 noha fmigitus by Fleming in 1828, Cyatliophyllmn fmigitus bv Ge'initz in 

 1845, ClisiophyUum prolapsum by M'Coy in 1849, Aulophylium funnitus 

 by the aamc authors in 1851 who named ii AulophyUum prolapsum in 1845 



