42 PROCEEDINGS COTTESWOLD CLUB 1907 
these names that would suffer; though in general practice 
they have obtained much the wider recognition. 
Of species referable to the genus Czzcta, Davidson, 
in his Monograph, recognised only two, “Wadldhermia 
numismats, and with a query, “W. cor.” Under the first 
name he figured a variety of forms, none of which strictly 
correspond with the type; and under the second name he 
figured (App. to Suppl., Pl. xix. fig. 16) a form which is 
certainly not Zerebratula cor. Further he gave a varietal 
name, sabuumismatis, to a form which he regarded as 
a variety of 7. xumismales. This form, however, which 
occurs in a much higher zone of the Pliensbachian, has 
not the distinctive beak-characters of Czzcfa (see later, 
p- 44,) and it must be excluded from the genus. 
Thus in British Brachiopod literature there were only two 
names in use; and when Mtr L. Richardson placed in my 
hands a series of Czzcfa for identification, it was obvious 
that these names were insufficient. The same applied to 
a considerable series of specimens submitted by Mr 
Tutcher from the Lias of Radstock. Mr Richardson 
therefore urged a description of these forms; the Council 
of the Cotteswold Field Club most generously placed 
two plates at my disposal; Mr Tutcher in the very 
kindest manner undertook the great task of photographing 
the various forms; and other series of specimens being 
placed in my hands, the present communication is the 
result. . 
Many thanks are due to Mr J. W. D. Marshall for the 
large series submitted from his collection; to Mr E. 
Talbot Paris for a specimen from Churchdown; to Mr 
Chartron for a French specimen of C. cov, which he 
kindly sent for my collection some years ago. Also in my 
collection there are specimens obtained by my father from 
Cheltenham, and by myself from Radstock, from Coaley, 
near Dursley, and from Normandy. 
