50 



CARBONIFEROUS LAMELLIBRANCHIATA. 



NlJCULIDiE — 



1. Nucula, Lamarck 



2. Nuculaua, Link 



Pectunculiu'^ — 



Tellinomya, Hall 



Arcid^ — 



Parallelodou, 3Ieek and Worthen 



PlKNID^ — 



1. Pinna, Listen' 



2. Aviculopinna, Meek 



Mttilid^ — 



1. Myalina, de Koninch 



2. Modiola, Lamarck 



Aticulid^ — 



1. Posidonomya, Bronn 



2. Posidonielia (new genus), de Koninck 



3. Pteronites, 31'Coy 



4. Leiopteria, Hall 



5. Eutotia (new genus), de Koninck 



6. Pachypteria (new genus), de Koninck 



7. Streblopteria, M'Coy 



8. Aviculopecten, M'Coy 



9. Entolium, Meek 



LmiD^ — 



Limatulina (new genus), de Koninck 



In an Appendix — 

 Pachydomus 

 Edmondia 

 Sanguinolites 

 Cypricardella 

 Protoschizodus 



6 species, 4 being new. 

 2 „ 1 



2.1 



43 



29 



1 , 







3 , 



1 



9 , 



5 



19 , 



, 13 



5 . 



, 4 



1 , 







2 „ 2 



21 , 



, 17 



11 , 



, 10 



1 , 







18 , 



, 15 



59 , 



, 38 



5 , 



4 



J- 5) 





■*- J) 





J- ») 





i ,, 





1 





— making a grand total of 310 new species. 



Of the whole number of species described 262 are stated to be more or less 

 rare, and 35 species are founded on single or incomplete specimens. Seven new 

 genera are instituted for species which had previously been referred to some 

 already described. 



1886. A full and copious list of the fossils of the Carboniferous series in 

 Northumberland is contained in chap, xiv of the " Materials for a Palgeontology of 

 Northumberland," of Professor Lebour's ' Outlines of the Geology of Northumber- 

 land and Durham,' second edition, 1886, pp. 108 — 128. The fossils are given in 

 lists from each bed, but no new species are described ; several have only the genus 

 indicated, the species being new or not determined. 



1887. In the second edition of " The Geology of the Carboniferous Limestone, 



