34 CARBONICOLA, ANTHRACOMYA, AND NATADITES. 
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 fabeformis' in the Lower 
and Middle Coal-measures of and around Castlecomer. 
1881. Professor A. von Koenen, of Géttingen, has an important paper’ in the 
‘Zeitsch. Deutschen Geolog. Gesellsch.,’ vol. xxxiii, 1881, p. 680, pl. 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 Anthracosixv are related 
to Cardiniz. 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 Carbonicola 
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 (pl. xvu, fig. 14) is exceedingly hke the shell I figured (‘ Quart. Journ. Geol. 
Soc.,’ 1893, pl. 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. vu, p. 143, &.) “On 
the Geology and Paleontology 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 Palzeozoic Fossils, 
Britain,’ 1888, p. 278, &c.: 
| There is a misprint in the original, p. 25, of fabzforonis for fabeformis. 
2 “ Ueber die Gattung Anoplophora, Sandberger (Uniona, Poblig).” 
