CRITICAL BIBLIOGRAPHY. 23 
1856. S. P. Woodward in his ‘ Manual of the Mollusca’ placed the forms now 
known as Carbonicola under Anthracosia (King) as a subgenus of Cardinia 
(p. 470). He says these shells are associated with Nautili, Discinez, &c., but gives 
no locality in which this association occurs. 
In the reprint 1880 there is an appendix by Ralph Tate, in which (p. 71) 
Anthracosia and Carbonicola are placed as two distinct genera of the Unionide ; 
he follows King and McCoy in the diagnosis of each genus. At p. 69 Anthra- 
coptera is placed under the Mytilidew, and at p. 80 Anthracomya is placed under 
the Myacidez, Salter’s description being followed in the two latter genera. 
1855-9. In 1855 to 1859, d’Hichwald, in the ‘ Lethza Rossica,’ described and 
figured— 
Modiolopsis conspicua. Cypricardia pumila. 
ss tenuissima. Modiolopsis Teplofi, Verneuil. 
P tenera. Cardinia Hichwaldiana. 
All of these, except the last, from their shape appear to be Anthracomyez. 
On March 8th, 1858, Messrs. F. B. Shumard and G. C. Swallow read a paper, 
** Descriptions of New Fossils from the Coal-measures of Missouri and Kansas,” 
published in 1858 in the ‘ Transactions of the Academy of Science of St. Louis,’ 
vol. i, p. 198, in which are described Mytilus Ottawaensis, Mytilus tenwradiatus, 
Myalina Kansasensis, and Myalina recta from the Coal-measures which agree very 
closely in character with Naiadites. Mention is also made in the list, p. 177, of 
Myalina subquadrata from Permian and Coal-measure beds of the Valley of 
Verdigris. Iam unable to find the description, but the shell is, however, figured 
by Messrs. Meek and Hayden on p. 33 ot their ‘ Paleontology of Upper Missouri,’ 
in which is also figured aud described M. aviculoides, pt. 1, pl. 1, figs. 8 a—8 d. 
1859-64. In 1859 R. Ludwig published in the ‘ Palzontographica,’ Band vii, 
pp. 38—38, ‘‘ Die Najaden der Rheinisch-Westphilischen Steinkohlenformation,” 
in which he figures and describes from that coal-field— 
Unio securiformis. Anodonta procera. 
» obtusus. 55 minima. 
» cymbxformis. Cyrena (Cyclas) rostrata. 
Anodonta lucida. 5 oa anthracina. 
Hardensteinensis. 5 3 extenta. 
a brevis. Dreissina laciniosa. 
- cicatricosa. 
In 1861, in another paper entitled “‘ Siisswasserbewohner aus der Westphilis- 
chen Steinkohlenformation ” (‘ Paleeontographica,’ Band vi, p. 182), he describes 
and figures— 
