28 CARBONICOLA, ANTHRACOMYA, AND NAIADITES. 



1862. Mr. Thos. Wardle, F.G.S., contributed a paper on " The Geology of the 

 Neighbourhood of Leek " to John Sleigh's ' Ancient History of Leek,' in which 

 he gives lists of Anthracosia (Carbonicola), Anthracomya, and Anthracoptera 

 (Naiadites) which occur in the beds of the North Staffordshire Coal-field, and on 

 pi. iv figures two specimens of Carbonicola acuta, fig. 13, under the name of 

 Anthracosia robusta. Fig. 14, as Anthracomya, resembles A. pumila. 



1862. In April of this year Mr. George Wild read his paper on " The Fulledge 

 Section of the Burnley Coal-field ' before the Manchester Geological Society, 

 subsequently published in vol. iv, pp. 180, &c, of the ' Transactions.' He gives 

 accurate horizons for shell-bearing beds, but only mentions the specific names of 

 two of them, Anthracosia robusta and A. acuta. 



1865. Huxley and Etheridge enumerate several species in their ' Catalogue of 

 the Collection of Fossils in the Museum of Practical Geology,' pp. 156 — 161, but 

 mention no new forms nor give any descriptive details. 



1864-82. H. B. Geinitz remarks on the paper by Giimbel, " Ueber das 

 Vorkommen von Susswasserconchylien am Irmelsberge bei Crock am Thuringer- 

 Wald," in the c Neues Jahrbuch f. Min.,' &c, 1864, p. 651, on the forms — 



Unio tellinarius, Gold., 

 „ ThuringensiSy Ludwig, 

 „ uniformis, Goldfuss, 



Anodonta phaseolina, ? Estheria, 



Unio crassidens, Ludwig, 



„ carbonaria, Gold, 



„ Ooldfussiana, de Koninck, 

 Anodonta ovalis, Martin, 



only inventing the doubtful form A. phaseolina. He criticises Ludwig's species, 

 and considers many of the named forms as synonymous. 



1882. Later again, in 1882, he published a new form from the Dyas, 

 Anthracosia stegocephalum (' Nachtrage zur Dyas,' Heft 2, 1882, p. 43, pi. viii, 

 figs. 20, 21). 



1865. Volpersdorf describes and figures a Modiola, sp., from Glatz County in 

 beds with scales of Bhizodus Eibberti, in the ' Zeitschrift des Deutsch. Geol. Ges.,' 

 vol. xvii, 1865, p. 276, pi. vi, fig. 6, which is doubtless Anthracomya. 



1860. McChesney described Myalina Swallovi in his ' New Species of 

 Palaeozoic Fossils,' p. 57, issued in 1860, and with the illustrations to the same 

 gives figures on pi. ii, figs. 6 a, 6 b : "I have not been able to obtain access to these 

 papers, and quote the reference from Messrs. Meek and Worthen's ' Geological 

 Survey of Illinois (Palaeontology),' vol. ii, p. 341." 



1860. In the ' Proceedings of the Academy of Natural Sciences of Phila- 



Nova Scotia," by Sir William Dawson, was read before the Geol. Soc. London, in which he points out 

 that some of the shells named by him Naiadites belong to the same genera as those subsequently named 

 Anthracomya and Anthracoptera by Salter ; and that consequently his name Naiadites has priority. 

 He advances additional reasons for a fresh-water habitat of these shells. A note was appended by 

 myself, in which I concurred in the substitution of the name Naiadites for Anthracoptera. 



