160 Proceedings of the Royal Physical Society. 



coal measures, although Professor Young's descriptions were 

 taken from the more perfect examples furnished by the North 

 Staffordshire district. Professor Young, in the same paper, 

 also correctly pointed out the affinity to Mesolepis, and conse- 

 quently also to Platysomus, of our well-known Scottish Lower 

 Carboniferous genus Eurynotus, but I fear we cannot accept 

 his sub-order Zepidopleuridce, in which he sought to include 

 both the Platysomid and Pycnodont fishes. His paper on 

 " Carboniferous Glyptodipterines " (Rhizodopsis, Rhizodus, 

 etc.), also published in 1866, deals largely with Scottish 

 specimens, and with forms which constantly come under 

 the notice of the Scottish collector. Professor Young has 

 given, besides, several other notices of fish remains from 

 the Carboniferous rocks of the West of Scotland, as has also 

 Mr James Thomson, of Glasgow, among whose contributions 

 may be specially mentioned his description and figure of an 

 enormous Acanthodes from the Palace Craig Ironstone of 

 Lanarkshire. Of purely local work, a very creditable example, 

 though requiring some revision, is the list of carboniferous 

 fishes in the "Catalogue of the Western Scottish Fossils," com- 

 piled by Messrs Young and Armstrong, published first in the 

 Transactions of the Geological Society of Glasgow, and after- 

 wards issued as one of the "British Association Guide Books" 

 on the occasion of the meeting of that body at Glasgow in 1876. 

 I cannot conclude this part of our subject without alluding 

 to the great services which have accrued to Scottish fossil 

 ichthyology by the singular abilities, as an observer and 

 collector, of our genial friend Mr C. W. Peach. Mr Peach's 

 keen eye has, in whatever part of the country he has been 

 located, been always on the outlook for something new in 

 Natural History, whether recent or fossil ; and in the case of 

 fossil fishes it has not looked in vain. To him we owe the dis- 

 covery of the Old Eed forms Tristichopterics alatus, Pterichthys 

 Dickii, Acanthodes Peachii, Acanthodes coriaceus ; and the 

 large collections which he made in various parts of Caithness, 

 selections from which occupy important places in many of 

 our museums, afford valuable material for the study of the 

 structure, species, and distribution of the Old Eed fishes of the 

 north of Scotland. 



