36 CARBONICOLA, ANTHRACOMYA, AND NAIADITES. 



Many species of each form are described from the Permian beds of Russia, 

 but the work will be here more fully discussed under the observations on the 

 genus Carbonicola. 



1893. In 1893 he published a small paper in Russ and German, " Ueber ' 

 siisswasser Lamellibranchiata aus den carbonischen Bildungen des Donetz 

 Beckens," read before the Section of Geology and Mineralogy of the St. 

 Petersburg Natural History Society ; in this he gives a plate, figs. 1 to 7, showing 

 the hinge apparatus of Carbonicola, M'Coy, and figs. 10 to 17 of Anthracosia, King. 



1893. In the ' Quart. Journ. Geol. Soc.,' May, 1893, vol. xlix, p. 249, is a 

 paper by myself on " The Affinities of Anthracoptera and Anthracomya" in which 

 I attempted to delineate more fully the generic characters of each, and to describe and 

 figure the known forms. Subsequent study has necessitated some few alterations. 



Another short paper of mine is to be found in the ' Annual Report of the 

 North Staffordshire Field Naturalists' Club and Archaeological Society,' which, 

 however, contains nothing beyond what is included in the previous paper. 



In the ' Geological Magazine,' dec. Ill, 1893, vol. x, p. 514, is a note on 

 the so-called My alii ta crassa, Fleming, in which I point out the identity of the 

 anatomical characters of the shell of Myalina crassa with those of Anthracoptera 

 (Naiadites) . 



In the same volume, p. 540, is a note (with a woodcut) on a slab from the 

 shale above the Kinderscout Grit, showing a piece of fossil wood surrounded by 

 numbers of Anthracoptera (Naiadites), and to which they had evidently attached 

 themselves with the byssus. 



1893. Mr. J. F. Whiteeaves published a paper on some large Unio-like shells 

 of the South Joggins in the ' Trans. Royal Society of Canada,' Sect. IV, 1893, 

 p. 21, in which he discusses the question of the earliest occurrence of Unio in 

 geological strata, and describes some very large new Coal-measure fossils as 

 Asthenodonta, Westoni, with two figures, from which their close generic relation- 

 ship to Carbonicola is very apparent, the hinge resembling that of Carbonicola 

 aquillna, and to this genus it will probably be one day referred. 



When I went to look through the collection of Coal-measure shells in the 

 Manchester Museum, Owens College, I found that Mr. H. Bolton, F.R.S.E., 

 Assistant Keeper, had intended to work up the subject, and had already in MS. 

 a portion of his paper. It was at first proposed that he should join me, and 

 that we should issue a joint Monograph ; but subsequently, with great generosity, 

 he retired and left the work to me. I have to thank him for his self-effacement 

 in this matter, and for his further kindness in looking over my specimens, MS., 

 and proof sheets, and for several valuable observations which have been of great 

 service to me in the preparation of the section on Carbonicola. 



