34 CARBON ICOLA, ANTHRACOMYA, AND NAIAD ITES. 



1881. Mr. W. H. Baily, in the "Explanatory Memoir of the Geology of the 

 Leinster Coal-fields," ' Geological Survey of Ireland,' 1881, on pp. 21 and 25 notes 

 the occurrence of Anthracosia Bilboensis and Myacites fabseformis 1 in the Lower 

 and Middle Coal-measures of and around Castlecomer. 



1881. Professor A. von Koenen, of Gottingen, has an important paper 2 in the 

 ' Zeitsch. Deutschen Geolog. Gesellsch.,' vol. xxxiii, 1881, p. 680, pi. xxvi, figs. 

 6, 7, in which he re-describes the hinge of Anthracosia securiformis, and points out 

 that Ludwig overlooked the fact that the supernumerary muscle-scar is close to 

 the hinge-line, and on this fact bases his view that the Anthracosix are related 

 to Cardinix. With regard to a lateral tooth he says, " Als Seitenzahn deutbar eine 

 stumppe Kante auf dem Schossrande der linken Klappe und in der rechten eine 

 flache Furche vorhanden." His figures are typical of the hinge of Garbonicola 

 aquilina, and agree well with King's figures (op. supra cit.). 



1882. The ' Recherches sur les Terrains anciens des Asturies et de la Galice ' 

 of Dr. C. Barrois appeared in 1882. He refers to Coal-measure shells at pp. 334 

 and 335. He makes the pertinent observation that the forms referred to 

 Myalina by Meek and Worthen (op. supra cit.) cannot be separated from Salter's 

 Anthracoptera, and describes and figures Myalina carinata and M . triangularis ; 

 but does not recognise the fact that these forms have not the true myophores of 

 Myalina. 



He figures and describes a shell which he refers to Pachyodon bipennis, 

 Brown ; but his figure appears too angular to agree with the original drawing. 

 There is also one new form described, at p. 343, as Naiadites Tarini, the figure of 

 which (pi. xvii, fig. 14) is exceedingly like the shell I figured (' Quart. Journ. Geol. 

 Soc.,' 1893, pi. x, fig. 13) as Anthracomya lanceolata. It is probable that the two 

 shells may be of the same species. 



1882. In the same year Dr. J. R. S. Hunter, of Braidwood, produced his paper 

 (' Trans. Geol. Soc. of Glasgow,' March, 1882, vol. vii, p. 143, &c.) " On 

 the Geology and Palseontology of Banhead, Bellfield, Coalburn, and Lesma- 

 hagow," with lists of fossils. He enumerates from the Middle Coal-measures 

 (p. 150)— 



Anthracoptera carinata. Anthracoptera quadrata. 



,, modiolaris. Anthracosia acuta. 



1888. The following British forms of Anthracomya, Anthracosia, and 

 Anthracoptera are enumerated in Etheridge's ' Catalogue of Palasozoic Fossils, 

 Britain,' 1888, p. 278, &c. : 



1 There is a misprint in the origiDal, p. 25, of fabseforonis for fabseformis . 



2 " Ueber die Gattung Anoplophora, Sandberger (Uniona, Pohlig)." 



