30 CARBONICOLA, ANTHRACOMYA, AND NAIADITES. 



(Volpersdorf, op. supra cit.). This shell occurs in the Coal-measures of 

 Lancashire. 



1870. In the ' Geological Magazine ' for 1870 is a paper by Professor Rupert 

 Jones on some " Bntomostraca from the Coal-measures of South "Wales." At p. 21 6 

 he notices some Anthracomyse from the Bbbw Valley, and refers to the compressed 

 Anthracomyas in the Ardwick beds described by Phillips (op. supra cit.), and 

 figures (figs. 3 and 18, pi. ix) are given. 



1891. This author also refers generally to the Coal-measure bivalves in his 

 Address to the Geological Section of the British Association at Cardiff, in 1891. 

 At p. 17 he remarks, " There is great probability of these not being truly marine. 

 They may have lived in the brackish waters of lagoons and creeks, in the black, 

 muddy swamps, having some communication with the sea, and often or 

 occasionally inundated with salt water." 



1871. Messrs. Young and Armstrong brought out their work ' On the Carbo- 

 niferous Fossils of the West of Scotland, for the Use of the British Association 

 Meeting at Glasgow, 1871.' They give lists and localities, but describe no new 

 forms. Their views as to the fresh-water habitat of the shells I have quoted above 

 (p. 4). 



1871. In 1871 Ferd. Stoliczka, in ' Palasontologica Indica,' vol. viii, p. 84, 

 places Anthracosia under Saxicava, and writes, " Prof. King advocates the idea 

 that Anthracosia is a genus of Unionidas, but there can be little doubt as to its 

 close relation to Notomya, and it is even difficult to distinguish some of the 

 species generically. The ligamental area of Anthracosia much more recalls that 

 of Panopgea and Gyrtodaria than that of any known Unionidae, and as Salter 

 distinctly asserts that it is a marine or brackish water shell, I think its classifica- 

 tion in this place (Saxicava) may be the more correct one." 



1873. The work was carried on in Scotland by Mr. Robert Etheridge, jun., 

 his first paper on the subject appearing in the Appendix to the ' Memoirs of the 

 Geological Survey of Scotland : Explanation of Sheet 23.' Here a stratigraphical 

 list of the localities and beds containing Coal-measure Lamellibranchs is given, and 

 a note is appended (p. 104) on the burrowing habits and affinities of Anthracosia ; 

 he says, " Specimens of A. robusta and A. acuta were obtained resting on their 

 ventral margins at right angles to the bedding of the entombing matrix ; but none 

 were obtained in a vertical position burrowing, as we find is the case with recent 

 Mya ti^uncata." 



1875. In the ' Annals and Magazine of Natural History,' series 4, vol. xv, 1875, 

 p. 427, " Notes on Carboniferous Lamellibranchiata," he gives the bibliography of 

 Myalina crassa (Mytilus crassus of Fleming), and discusses its generic relations, 

 giving some excellent plates. 



1877. In the ' Geological Magazine,' new series, dec. 2, vol. iv, June, 1877, 



