319 



BEITISH FOSSILS, STEATIGEAPHICALLY AEEAKGED. 

 By Johk Moeeis, E.G.S. 

 L PALEOZOIC SYSTEM. 



( Continued from page 286. ) 



The folloTving table affords an approximate numerical estimate of the genera and 

 species of Silurian fossils within the British area hitherto, described. 



Longmynd Lingula 



Llandeilo Llandovery Wenlocfc 



and 



and 



and 





Rocks. 



Flags. 



Caradoc. 



Maj 



Hill. 



Ludlow. 





Gen. 



Spec 



Gen. 



Spec. 



Gea 



Spec. 



Gen 



. Spec 



. Gen 



Spec. 



PtAl^T^ ? - . . - 



2 



3 



2 



2 



4 



5 



1 



1 



3 



4 



Amoephozoa - - - 











2 



2 







3 



3 



ZooPHTTA Anthrozoa 











12 



18 



"s 



i'i 



31 



72 



ZooPHYTA Hydroidea 











4 



26 



1 



1 



2 



3 



ECHINODEEMATA - - 











10 



19 



2 



2 



25 



50 



Annellida - - - - 



2 



3 



1 



"i 



10 



18 



2 



3 



4 



7 



Ceustacea - . . - 



1 



1 



6 



10 



36 



116 



12 



15 



19 



44 



Beyozoa .... 



1 





1 



1 



7 



12 



3 



4 



8 



18 



Beachtopoda ... 







2 



3 



12 



96 



9 



50 



16 



87 



MOXOMYAEIA - - - 











3 



16 



1 



5 



3 



17 



DiMYAEIA - . . . 











11 



33 



8 



16 



16 



56 



Gasteeopoda - - - 











13 



36 



12 



24 



11 



37 



Heteeopoda - - - 











1 



9 



1 



5 



1 



6 



Pteropoda - - - 











4 



10 



3 



3 



3 



5 



Cephalopoda - - - 











5 



38 



6 



15 



6 



40 



Pisces 



















5 



9 



Tilestones. 



Gen. Spec 

 2 



List of Books, Mbmoies, &c., relating to Silurian and Cambrian Rocks. 



[Note. — The principal abbreriations nsed in the above references belong to the following works : — 

 A. N. H., Annals of Natui-al History; G. J., Journal of Geological Society; G. R., Geological Report, 

 &c., Portlock ; M. G. S., Memoirs of Geological Survey; P. F., Palaeozoic Fossils, M'Coy ; P. N. Y., 

 Palaeontology of New York, Hall; S. S., Silurian System, 4to. ; Sil., Siluria, Marchison ; S. F., 

 Silurian Fossils, M'Coy.] 



Aikin, A. — " Observations on the Wrekin." Geol. Tram. 1 ser., Vol. I., p. 191. 

 Aveline, W. T. — See Ramsay and Aveline. See Salter and Aveline. 

 Banks, R. H. — " On the Tilestones of Kington," &c., Journ. Geol. Soc, 12, p. 93. 

 Barrande, J. — " Le Systeme Silurian de la Boheme " {TriloUtes ) 1852. 



*' Graptolites de Boheme." Prague, 1850. 

 Bowman^ J. E. — " On a small patch of Silurian Rocks, to the west of Abergele," 

 &c., Geol. Proc, Vol. II., p. 666 ; Geol. Trans. 2 ser. Vol. VI., 

 p. 195. 



„ " Notice of Upper Silurian Rocks," &c., Trans. Manch. Geol. Soc, 



Vol. L, p. 194. 



Bryson, A. — On Worm Tracks in Silurian Slates." Ed. New Phil. Journ., 1855, 

 p. 368. 



„ " On Diatomaceain the Silurian Slates of Scotland." Ihid., p. 368, 



Buckland, W. Rev. Prof. — "Description of the Quartz Rock of Lickey Hill, Wor- 

 cestershire." Geol. Trans., 1 ser. Vol. V, p. 507. 

 Cunningham, R. J. H. — Geognostical Account of the County of Sutherland." 



Trans. Highland Soc, April, 1839. 

 Conyheare, Rev. J. J. — <' On the Geology of the Malvern Hills." Annals of 

 Philosophy, Vol. XX., 1822, p. 337. 



