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 
stsswasser 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 Archeological Society,’ which, 
however, contains nothing beyond what is included in the previous paper. 
In the ‘Geological Magazine,’ dec. III, 1893, vol. x, p. 514, is a note on 
the so-called Myalina 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) ona slab from the 
shale above the Kinderscout Grit, showing a piece of fossil wood surrounded by 
numbers of Anthracoptera (Naadites), 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 Weston, with two figures, from which their close generic relation- 
ship to Carbonicola is very apparent, the hinge resembling that of Carbonicola 
aquilina, 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. 
