496 PEOF. T. E. JONES AND ME. J. W. KIEKBY ON OSTEA.CODA OF 



41. Notes on the Disteibution of the Osteacoda of the Caeboni- 

 EEEous PoEMATiONs of the Beitish Isles. By Prof. T. E-tjpeet 

 Jones, F.B.S., F.G.S., and J. W. Kiekbt, Esq. (Bead May 12, 



1886.) 



Contents. 

 I. Introduction. 

 II. Classification of the Strata in Scotland and England : — " Scotland East," 

 " Scotland West," " England North," " England South." 



III. Stratigraphical Distribution of the Ostracoda. 



1, Scotland. 



§ 1. South-east Scotland; Calciferous Sandstone series. 

 § 2. South-west Scotland ; Calciferous Sandstone series, 

 § 3. South-west Scotland ; Carboniferous Limestone series. 



2. England. 



§ 1. North England and Isle of Man. 



I 2. Central and South England and South Wales. 



IV. Ireland. 



y. Distribution of Ostracoda in Permian Strata of England. 

 VI. Range of British Carboniferous Ostracoda in North America and Europe. 

 § 1. North America. 

 § 2. Europe. 

 VII. Appendix. 



Table I. Stratigraphical : showing the distribution of Ostracoda, in the Car- 

 boniferous Series of Scotland, and in the Permian and Carboni- 

 ferous Series of the North of England. 

 Table II. The genera and species of Carboniferous Ostracoda and their 

 occurrences in England, Scotland, and Ireland. 



I. Inteoduction. 



The known Ostracoda of the British Carboniferous Pormations are 

 not even yet all described, although fifty-five species have been 

 determined or redescribed, with illustrations, since this paper was 

 read (see page 507). There are now 177 known species and notable 

 varieties of Carboniferous Ostracods, belonging to 33 genera of 9 

 families. 



II. Classification oe the Steata. 



With regard to their distribution in the strata, it is necessary to 

 premise that in Scotland the Carboniferous rocks are usually grouped 

 as follows : — 



1 ^ , f {h). Upper red beds. 



i. lyoai-measures | j^^^^ Coal-measures proper, with workable coals. 



2. MiUstone Grit. 



[■(c). Upper beds, with limestones. 



3. Carboniferous Limestone J (6). Middle beds, with workable coals and iron- 



Series I stones. 



\_{a). Lower beds, with limestones. 

 A r^ ^ •£ o J {(b). Upper or Cement-stone series. 



4. Calciferous Sandstones... j^^^-^^ j^^^^^ ^^ Eed-sandstone series. 



