PROCEEDINGS 1839 — 1840. 
73 
been found at Burdiehouse in connection. A few days afterwards, 
M. Agassiz, in company with Prof. Buckland, visited the Leeds 
Museum, and I well remember the delight, the ecstatic delight, evinced 
by the distinguished naturalist of Neufchatel, when he first beheld 
the splendid head of this animal in the Leeds Museum. Here, said 
he, we have the same scales and the same teeth as those of Burdie- 
house, conjoined in the same individual. It is therefore no longer a 
conjecture that they might belong to the same animal. And in these 
selfsame specimens we have the hyoid and branchiostic apparatus of 
bones ; it is therefore no longer a conjecture that the Burdiehouse 
fossils were the remains of fishes and not of reptiles. To them 
M. Agassiz assigned the name Megalichthys." Besides the remains 
of Megalichthys, Mr. Teale exhibited and described fossil remains, 
which he attributed to the genera Acanthodes, Platysomus and 
Holoptychius amongst the Ganoids and of the Placoid order, 
Gyracanthus, Hybodus (Ctenacanthus) Pleuracanthus, Helodus, 
Ctenoptychius, Ctenodus and Diplodus. He then remarked, ' I have 
now endeavoured to bring into view the scattered fragments of our 
knowledge of the fossil Ichthyology of this district, and have attempted 
to assign to each element of this knowledge its proper position in the 
large Zoological group of fishes : it must however be evident, that 
we have as yet but entered upon the very threshold of the investi- 
gation. Much remains to be accomplished before we have completed 
even the first stage of the enquiry, namely, the determination of all 
the genera and species of fishes which exist in the neighbouring 
strata, and the distinguishing characteristics of each. When this 
shall have been accomplished, it will be necessary to proceed to the 
second important consideration, as to the precise range and circum- 
stances peculiar to each individual species. The result of these 
investigations will afford many and valuable applications, and throw 
light on that most interesting of all the geological epochs, the 
carboniferous era.' 
A discussion was introduced by Mr. Henry Hartop on the 
boilers of steam engines and the construction of engine chimneys. 
The question mainly turned on the relative merits of the waggon 
boiler invented by Mr. Watt's, and a new boiler recently come into 
