40 



CARBONIFEROUS LAMELLIBRANCHIATA. 



of the 'Final Report of the United States Geological Survey of Nebraska,' which 

 is dated 1872. 



Many Carboniferous Lamellibranchs are described and figured, with the 

 following new forms, pp. 195, 212 — 220 : 



Aviculopecten Whitei. 

 Pleurophorus ohlongus. 

 Mdmondia reflexa. 

 — ? glabra. 



JEdmondia subtruncata. 



— Aspinwallensis. 

 Allorisma {Sedgwichia) reflexa. 



— ( — ) subelegans. 



In many cases the generic names of the original authors are revised. 



1872. Mr. W. H. Baily read a paper before the Royal Geological Society of 

 Ireland on April 12th, 1872, subsequently published in vol. xiii (vol. iii, new 

 series) of the Journal of that Society, entitled " Remarks on the genus Pleuro- 

 rhynchus, with a description of a new species. He shows that the genus ranges 

 from the Caradoc-beds to the Carboniferous Limestone, eight species being from 

 the latter formation. He gives figures and descriptions, p. 25, pi. iv, figs. 1 a — d^ of 

 Pleurorhynclms Koninchii, which occurred in the Lower Limestone near Rathkeale, 

 CO. Limerick, and states that the name was recorded at the Meeting of the British 

 Association in Dublin as early as 1865. 



The contribution of Mr. R. Btheridge, jun., to the Palaeontology of the 

 Carboniferous series are many and valuable, and extend over a series of years, 

 commencing in 1872 to 1882. It will be convenient to mention all these papers 

 in series, giving the date of each. 



His first communication occurs in the ' Explanation of Sheet 22 of the 

 Map of the Geological Survey of Scotland,' published in 1872, the preface 

 dating 1871. It consists of a stratigraphical list and table of the fossils found in 

 the district comprised, with the map showing the horizons at which the several 

 fossils occur, and the vertical range of each. There is a short note on Aviculopecten 

 Sowerhii, M'Coy, on p. 50, under Section iv, "Description of Species." 



1873. In the Explanation of Sheet 23 of Scotland are three appendices 

 by Mr. R. Etheridge, jun.: No. 1, a list of localities; No. 2, a list of fossils 

 arranged stratigraphically ; No. 3, notes on certain genera and species mentioned 

 in the foregoing lists, in which the following species of Carboniferous Lamel- 

 libranchiata are described ; but no figures are given : 



Aviculopecten ornatus. 



,, sp. (afterwards uamed A. oryza, 

 'Geol.Mag.,' p. 303, 1874. 

 Posidonomya corrugata. 



Pteronites fluctuosus. 



A7ithracosia ; its burrowing habits and 



aflBnities, 

 Leda intermedia. 



1873. In the ' Geological Magazine,' vol. x, pp. 297 — 299, a paper " On some 



