210 PROCEEDINGS COTTESWOLD CLUB 1906 
This designation was no more fortunate, for there was 
already a Zerebratula angulata employed by Valenciennes 
(in Lamarck, “Anim. sans Vertébres”) who turned the 
Anomia angulata, Gmelin, over to the genus 7erebratuda. 
About the year 1845, Thomas Brown, in his “ Fossil 
Conchology,” noticing that 7° acuta was a double, gave to 
J. de C. Sowerby’s species the designation 7. acuta- 
plicata. He says nothing about Sowerby’s correction, 
but he employs the name 7. angulata for a Carbon- 
iferous species=Anomia angulata, Linné, which if it 
be the same as Axomia angulata, Gmelin, would seem 
to be rightly entitled to the name. 
In 1850, both the Jurassic and the Carboniferous species 
appear in d’Orbigny’s “ Prodrome ” as Rynchonella angu- 
/ata. In 1851, the Jurassic species, and in 1858, the 
Carboniferous one, occur in Dayidson’s classic “ Mono- 
graph of Brachiopoda” under the same designation ; but, 
in 1858, Davidson notices the double use of the term 7A. 
angulata. In 1884, in the index to his Monograph he 
accordingly alters the name of the Jurassic species to 7A. 
angulina. He quite overlooks Brown’s name acuta- 
plicata, which he ought to have employed. In fact, 
nobody seems to have attended to what Brown did—theré 
almost seems to have been a conspiracy of silence about 
his work. But Brown’s name must take precedence of 
Davidson’s angulina; and as acuta and angulata were 
already occupied, Brown’s name is quite valid. 
In the same index, and because of the change of X&. 
angulata to R. angulina, Davidson altered the name 2X. 
subangulata to R. subanguiina. But there was no need 
in any case to do this. He first used the name 4. sud- 
angulata for a species in Proc. Dorset Field Club, 1877, 
Vol. i, p. 83; and the name would not be affected by the 
fate of angulata. 
A summary of results and other particulars will be 
