42 REPORT— 1870. 



before wo can prepare a final Eeport. The Plates exhibited to the Section 

 and described below show some valuable results, 



Milne-Edwards and Jules Haime, in their paper on the Corals from the 

 Mountain Limestone, published in the Transactions of the Palaeontographi- 

 cal Society for 1852, state that this period is one of the richest in true Polyps, 

 and that 76 species up to that date have been found ; of these, they record 



43 as found in British strata. In the progress of our investigations we so 

 greatly add to this number that, from Scottish strata alone, we have obtained 

 64 species belonging to the following families : — 



Known. Doubtful. 



MiUeporidaB , . 8 



Favositida) 4 



Chsetidida) 5 3 



Halysitina 3 1 



Seriatopcridce 1 



Auloporida) 1 1 



CyathaxenidoQ 1 5 



Cyathophyllidffi 41 82 



*64 92 



Although some of these forms have been determined from somewhat im- 

 perfect data, we have no doubt that the continued investigation of these 

 remains wUl yet greatly increase their number, and cause considerable alter- 

 ations in their classification ; we consequently feel the necessity of being 

 more severe in our labours, not only with the view of adding to the knowledge 

 of species, but of getting rid of the numerous synonyms whicli encumber 

 the study of this interesting group of animal remains, 



Plate I, contains the genera Amplexus, Zcplirentis, Cyathophyllum, and 

 CamjMphylliim. Fig. 1 represents Amplexus coralloides (Sow.) ; fig. 7, A. 

 Menslowii (Edwards & Haime). This genus is characterized by broad tabula 

 and sparsely developed endotheca. These species are much restricted in 

 their vertical range : we are not aware of their being found in any other 

 position than in the lower members of the series, A. coralloides has been 

 found at Beith, Ayrshire, aud at Brockley, near Lesmahagow, Lanarkshire ; A, 

 Hensloivii at Brockley, Lesmahagow. Pigs. 3, 6, <fc 9 represent the genus 

 Zephrentis ; fig. 3, Z. cylindriea (Secular), This form is restricted to the 

 lower beds. Fig. 6, Z. Griffitlu. This species is found in all the members 

 of the Mountain Limestone. It has a vertical range of 3000 feet. Fig. 1 1 , 

 Z. Gxieranyeri ; it is restricted to the lower beds, and is found at Auchenskeigli, 

 Ayrshire. Fig. 2 is closely allied to fig. 3, and is probably a young form. 

 Figs, 5 & 9 difi'er in the arrangement of the tabulaj. Figs. 8 & 10 repre- 

 sent the genus CyathopliyUum ; fig. 8, 0. Murchisomi. This species is 

 very rare in Scotland, and found only in the lower beds at Bathgate, Lin- 

 lithgowshii-e. Figs, 10 & 10 a, G. paricida. This species is also restricted 

 to the lower beds. It is found at Beith, Ayrshire, and is not rare. Fig. 4, 

 Gampopliylhmn Murchisonii. This and the preceding forms are developed 

 by caUcular gemmation. In the longitudinal section of fig. 4, we have a 

 young coral attached to the calice of the parent. In comparing the genus 



* The 04 species referred to have been named from the works of Mihie-Edwards and 

 Haime aud M'Coy. Those referred to as doubtful seem to us to have structural charac- 

 teristics sufficient to warrant specific distinction ; but as our investigations are not suffi- 

 ciently advanced to warrant their determination, we r^s^ry^ their cl^sifloation for a future 

 contribution. 



