SUPPLEMENT TO THE BRITISH PERMIAN BRACHIOPODA. 
My Monograph of British Permian Brachiopoda ' was piiblished in April, 1858, — • 
twenty-two years ago. Since that period only one more species has been added to the 
forms there enumerated. I have consequently but little to add to this Supplement. 
Many specimens of the described species have, however, been collected in the old 
localities, and in some new ones, and which may require to be noticed. The East 
Thickley Quarry, near the Stockton and Darlington Railway, has especially afforded a 
number of large and finely preserved specimens of several species, and a list of them was 
published in 1860, by the Darlington Naturahsts' Society, under the title, ' A list of Eossils 
found in the Marl-Slate and Compact Limestone at East Thickley.' From this we 
extract the following names: — 1. Produdus horridtis ; 2. Strophalosia lamellosa ; 3. 
StropJi. Goldfiissi ; 4. Terehratula elon(/ata ; 5. Camarophoria crumena ; 6. Spirifera 
alata ; 7. Discina Koninckii ; 8. Lingula Credneri ; Widi S). Streptorhi/nchus pelarf/onatus. 
Thanks to the kindness of Messrs. R. J. Manson and T. Parker, I have been able to^ 
examine a large series of specimens they had collected in that remarkable locality. The 
specimens are generally in a very excellent state of preservation, and occur chiefly in a 
dark grey, compact limestone. Some specimens of Frodtidus liorridm show spines nearly 
three inches in length. Spirifera alata is better preserved than in any other place, 
Disdna Konindii (Sup., PI. XXX, fig. 4) occurs very large and perfect, some specimens 
even shoAving remains of colour. Lingula Credneri is likewise finely preserved ; while- 
Btreptorhyndius 2^dargonatus has attained, and even somewhat exceeded, seven lines in 
length by eight in breadth (Sup., PL XXX, fig. 3) . 
In 1864 was published in the ' Transactions of the Tyneside Naturalists' Field Club ' 
a very interesting paper, by Mr. James W. Kirkby, entitled, " On Some Fossils from the 
Lower Magnesian Limestone of Sunderland," and from this the following extracts, 
are taken. 
" The occurrence of fossils in the lower portion of the Permian or Magnesian limestone 
is so rare in the neighbourhood of Sunderland that I think it well to record the discovery 
of several species in the quarry of Messrs. Hartley and Co. at Bishopwearmouth. The 
beds wrought at this quarry are all included in that section of the Permian series of 
Durham which is now usually termed the Loiver Limestone. The Marl-slate and the upper 
incoherent portions of the Loiver red Sandstone are also occasionally exposed, but these 
are not worked ; of limestone alone there is about seventy-nine feet exposed." 
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