THE BRITISH FOSSIL BRACHIOPODA. 



351 



ferida. iii. Sub-Order Aphaneropegmata, sive Productacea, comprising the families 

 Strophomenida and Productida" 



The following Table comprises all that we know for certain, as well as much of what 

 is probable, about the relationships and ranges of the fossil Brachiopods, arranged as 

 families, sub-families, and genera, under the two great groups or orders (see pp. 351 and 353). 



Lyopomata, Owen = Tretenterata 



, King. 



1 













Families and Geneea. 



Palaeozoic. 



Mesozoic. 



Cainozoic. 



R 



| 



d 



QD 



p" 

 .3 



1 



2 



3 



o 



'3 

 o 



o 



1 



H 



5 



a 



s 

 o 



5 





a 



p§ 



f Lingula, Bruguiere, 1792 



Lingulella, Salter, 1866 



1. Family Lingulids, U*28?*fy ,f^ 863 



Gray 18SS i Glottidia, Ball, 1870 



Gray, 1838. 1 ? Glossiua> PUWpSt 1848 



1 Dignomia, Sail, 1871 



^ ? Lingulops, Sail, 1871 



f Obolus, Eichwald, 1829 



Obolella, Billings, 1861 



9 sv.*.,-/.. Hum m i- Monobolina, £a//er, 1865 



? 





















~ 



? 



— 













? 





%, 1846. 



3. Family DlsciNID-E, 

 Gray, 1840. 



? Helmersenia, Pander, 1861 . . . 

 ? Scbmidtia, Volborth, 1869... 

 ? Keyserlingia, Pander, 1861 



::: — - 



" Discina, Lamarck, 1819 "1 



Discinisca, Z>a//, 1871 J 



Paterula, Barrande, 1879 



Orbiculoidea, d'Orbigny, 1847 



Trematis, Sharpe, 1847 



Acrothele, Linnarson, 1875 ... 



L_ Schizomania, .ffa//, 1875 



f Crania, Retzius. 1781 





~~ 













! 





. „ ., ^ ,„.„ j ? Pseudocrania, IT Coy, 1851 



Jbr6«, 1838. ] pLolidopS) j a/? 1860 



^ Ancistrocrania, Dall, 1877 ... 



r SiphoBotreta,Z>e Verneuil,\M5 

 5. Family Siphonoteetids:, J Acrotreta, Kutorga, 1848 



— 



_ 













" 







Kulorga, 1848. 



6. Family TitiMEKELLiDiE, 

 Bat). & King. 



Volborthia, Moller, 1873 



, Kutorgina, Billings, 1861 



r Trimerella, Billings, 1862 



Monomerella, Billings, 1871. . . 



Rhynobolus, -Ha?/, 1871 



L Dinobolus, 5a//, 1871 





~ 







1 This arrangement of the Lyopomata or Tretenterata agrees mainly with the one proposed by Dall in 

 his ' Index to the Subdivisions of the Brachiopoda,' p. 80; Washington, 1877. See likewise Zittel's ' Hand- 

 buch der Palaeontologie,' 1880. In this Table I have followed Dall and Zittel's plan in the arrangement 

 of the genera, instead of the successional stratigraphical plan adopted in my article " What is a Brachiopod?" 

 published in the ' Geological Magazine ' for June, 18/7, dec. 2, vol. iv. Both ways have their advantages. 



