18 CARBONICOLA, ANTHRACOMYA, AND NAIADITES. 
and probably belongs to the genus Sanguinolites, though it has somewhat the shape 
of Anthracomya. 
1843. Morris’ gives in his ‘Catalogue of British Fossils,’ Ist edition, 1843, 
under Unio, some of the shells described in Prestwich’s memoir, U. ? aquilinus, 
U. ? centralis, U. ?dolobratus, U. ?modiolaris, and U. ? Urii; under the name 
Cardinia, U. acutus, U. subconstrictus, U. ovalis, U. phaseolus, and U. robustus ; 
under Modiola, Sowerby and Prestwich’s Modiola carinata; under Mytilus, 
Fleming’s Myalina crassa, Sowerby and Prestwich’s Mytilus triangularis ; under 
Avicula, the same authors’ Avicula quadrata and A. modiolaris. 
1843-46-55-64-67. H. B. Geinitz, in 1843, in ‘Gaea von Sachsen,’ p. 66, 
gives the forms Mya minuta, Unio carbonarius, Unio uniformis, the last of which, 
in 1846 (‘Grundriss,’ &., p. 443, pl. xvii, figs. 16, 17), Geinitz re-described 
as Cardinia Goldfussiana, probably because Goldfuss had not noted the fact that 
Sowerby’s shell Unio wniformis was from Oolite beds; and again in 1855 (* Die 
Versteinerungen der Steinkohlen-formation in Sachsen’ he gives a list of syno- 
nyms and references to date, and re-describes the species. 
He describes in 1855 Unio tellinarius, of which he says, ‘The posterior part of 
this shell is very variable—in fact, I never saw such a specimen as Goldfuss figures. 
Mine resemble more closely the second form figured by de Koninck, and when flat- 
tened, Cardinia phaseolus.”’ A new form, Cardinia Freystenii, pl. xxxv, fig. 7 a, A, 
here figured and described for the first time, appears to be a short truncate 
Anthracomya. 
A very important paper by this author appeared in 1864 in ‘ Neues Jahrbuch,’ 
&c., p. 651, which will be alluded to in detail further on, as it is a criticism on a 
work which had appeared just previously. 
In 1867, in the ‘Neues Jahrbuch f. Min.,’ &., p. 682, Prof. Geinitz figured 
and deseribed Anthracosia Weissiana from the Saarbruck Coal-field. I have been 
able to examine, by the kindness of Prof. Geinitz at Dresden, the type specimen, 
which consists of impressions in a micaceous sandstone. The shell is probably 
! In Morris’s ‘ Cat. Brit. Foss.,’ 2nd edit., 1854, 
Under Unio— Under Myalina— 
Unio ? aquilinus, Sow. Myalina carinata, Sow. 
» 2 centralis, Sow. »  quadrata, Sow. 
» ? dolabratus, Sow. Under Mytilus— 
» ? modiolaris, Sow. Mytilus crassus, Fleming. 
» ? parallelus, Sow. 55 triangularis, Sow. 
» ? Orii, Fleming. Under Avicula— 
Under Myacites— Avicula modiolaris, Sow. 
Myacites Ansticei, Sow. »  modioliformis, Brown. 

At p. 189, under Cardinia, those forms described as such in the previous edition are repeated ; 
and in addition, under Cardinia (Pachyodon), all those described by Capt. Brown in the ‘ Ann. Mag. 
Nat. Hist.,’ 1843 (see next page). 
