146 Proceedings of the Royal Physical Society. 



duced by Dr Buckland to the geological section immediately 

 after Dr Hibbert had read a paper, in which he considered 

 the gigantic teeth and bones found at Burdiehouse to ''resemble 

 those of Saurian reptiles." Their piscine nature was, however, 

 at once detected by the accomplished Swiss naturalist, and 

 the requisite material having been willingly handed over to 

 him, he prepared and read on the following Friday a " Eeport 

 on the Fossil Fishes of Scotland," in which several new genera 

 are named. Most of the Scottish material obtained by Agassiz 

 at this time was published in detail in the fasciculus of his 

 great work, which appeared in 1835, the Devonian forms in- 

 cluding, the genera Cephalaspis, Acanthodes, Cheir acanthus, 

 Cheirolepis, Pijoterus, and Osteolepis ; while those from Car- 

 boniferous rocks were referred to Amblypterus, Palceoniscus, 

 EurynotuSy Pygopterus, Megalichthys, Gyracanthus, Tristichius, 

 Ctenoptychius, etc. 



Agassiz revisited Scotland in 1842, and was present at the 

 meeting of the British Association held that year at Glasgow. 

 By this time the material for the further study and descrip- 

 tion of Scottish fossil fish-remains had vastly increased. 

 Large collections from the Old Bed Sandstone beds of Crom- 

 arty and Morayshire had been made by Hugh Miller, Dr 

 Malcolmson, Lady Gordon-Cumming, and Mr Alexander 

 Eobertson. The collections of Lord Enniskillen and Sir Philip 

 Grey-Egerton, which already, at the time of Agassiz's first 

 visit to Great Britain, afforded a magnificent display of 

 English and foreign species, now contained a choice selection 

 also from Scotland. Carboniferous forms had also been assi- 

 duously collected by Dr Eankin of Carluke, and others. The 

 large accession of material from the Old Bed Sandstone en- 

 abled Agassiz in 1842 to lay before the British Association a 

 " Eeport on the Fossil Fishes of the Devonian System," which 

 finishes with a list of fifty-five species belonging to twenty 

 genera. 



His great work, the " Eecherches sur les Poissons Fossiles " 

 was completed in 1843, and in it was inserted a general list 

 of all the fossil fishes which had till then come under his 

 notice. Here we find ninety-nine species named from Scottish 

 deposits, but, unfortunately, descriptions only of twenty-five 



