38 



Proceedings of the Royal Physical Society. 



boniferous Fossils of the West of Scotland, their Vertical Ptange 

 and Distribution, with General Catalogue of the Fossils, their 

 Mode of Occurrence, and an Index to the Principal Locali- 

 ties." * This catalogue, with its important mass of facts, 

 by Messrs Armstrong and Young, first appeared in the 

 Transactions of the Glasgow Geological Society, *[* but was 

 afterwards published separately as above. 



The " Glasgow Catalogue," as it is usually called, may be 

 said to have formed the basis of another list we have already 

 had occasion to notice when dealing with the Silurian shells — 

 " The Catalogue of Western Scottish Fossils." The remarks 

 then made are applicable here, only adding that the Carboni- 

 ferous portion is even more complete in its details than the 

 Silurian. 



The following is the census of Carboniferous Fossils found 

 in the west and west-central districts of Scotland, as then 

 computed by Messrs Armstrong and Young : 



Although not directly and simply devoted to the Palaeon- 

 tology of Scotland, but as bearing on it, may be mentioned 

 in conclusion tlie ^^ Thesaurus Devonico-Carhonifcrus,'' \ by 

 the late Dr J. J. Bigsby, F.E.S. This work (with its com- 

 panion the " Thesaurus Siluricus ") represents one of the 

 most painstaking pieces of geological research extant in the 

 English language. In it is given a census of the whole 

 world-wide fauna of the Devonian and Carboniferous rocks. 

 The range in time of each species is shown, and a few of the 

 chief localities given ; the fossils of the Scotch Carboniferous 

 system naturally receive due attention. 



The Brachiopoda is the most important class of the 



* Pp. 103, 8vo, Glasgow, 1871. t Vol. iii., Appendix. 



X Pp. 447, 4to, London, 1878. 



