6 BRITISH SILURIAN BRACHIOPODA. 
from the Clayslate (Lower Silurian of Dalecarlia). In 1837 appeared also the ‘ Lethza 
Suecica,’ wherein are described twenty-four Upper Silurian species, and eight common 
to the Upper and Lower Silurian Formations, viz., Leptena rugosa, L. euglypha, B, 
transversalis, Orthis pecten, O. elegantula, Atrypa reticularis, Terebratula plicatella, 
T. marginalis, and eighteen Lower Silurian only, forming a total of fifty Silurian 
species: of course what Hisinger considered species are in some cases now differently 
viewed. ‘There is nothing new in the ‘Supplementum Secundum’ to ‘Lethaa Suecica,’ 
published in 1840; but in the ‘Lethea Suecica; Supplementi Secundi continuatio,’ 
published in 1841, p. 4, pl. xh, fig. 3, @, 6, Cardium multisulcatum, Uis., is given, but this 
is a synonym of Pentamerus liratus, Sow. In 1840, volume seventh, and last, of 
‘Anteckningar,’ p. 62, contains a list of thirty-three (or rather thirty-two) species of 
Gothland Silurian Brachiopoda ; at p. 57, a similar list of six species from Oeland: from 
Ostrogothia eleven species; p. 71, from Westrogothia six species; and from Dalecarlia 
ten species of Brachiopoda. 
A great portion of the above details connected with Swedish Silurian Brachiopoda has 
been kindly forwarded to me by my able friend Herr G. Lindstrém, who has himself 
devoted so much time and care to the study of Swedish fossils, as well as to those of 
Great Britain; and I consider it desirable to give these details, that the reader should be 
in possession of the sources from which so many of our own British Silurian names have 
been taken ; forin no part of the world with which I am acquainted do we find assembled 
more species identical with our own. 
Grorc WAnLENBERG. In his “ Petrificata telluris Suecane,” published in the ‘ Acta 
Societatis Regize Scientiarum Upsalensis,’ vol. viii, p. 63, et seq., 1821, are described 
five Lower Silurian species of Brachiopoda, five common to Lower and Upper Silurian, 
and three Upper Silurian only ; total 13 sp.; and all are mentioned in the ‘ Letheea’ of 
Hisinger, excepting Anomites terebratulinus ; no figures are given. 
J. W. Datman. In the ‘Kongl. Vetenskaps-Academiens Handlingar’ for 1827 
(Stockholm, 1828), we find Dalman’s important memoir ‘ Uppstillning och Beskrifning 
af de i Sverige funne 'l'erebratuliter” (‘Descriptions of the Terebratulites found in 
Sweden” in the ‘Transactions of the Royal Academy of Sciences of Stockholm’). In the 
introduction he describes his new genera Leptena, Orthis, Delthyris, Gypidia, Cyrtia, and 
Atrypa, as well as fifty-mine species (exclusive of Crania which he did not consider to be 
a Brachiopod); of these, sixteen are Cretaceous, and forty-three Silurian. They are 
accompanied by six plates, subsequently copied by Hisinger in his ‘ Lethza.’?_In no other 
work of Dalman do we find reference to Silurian Brachiopoda; his memoirs published in 
the years 1824 and 1826 relating only to Trilobites. 
N. P. Ancexin. “ Museum Palzontologicum Suecicum in ordinem redigit, nec non 
