318 REV. S. GRAHAM BIRKS 



referred to as a possible fulcrum of the left pectoral fin. 

 Superimposed upon the more anterior portion of the basal 

 scale here described is a smaller and very much rounded scale 

 identical in surface and punctation with the basal scale. 

 Whether this is approximately the natural position of the 

 smaller scale or not it is not for us to say now, but on the face 

 of things it does not seem likely that this is its natural 

 position. The fish in the Leeds Museum described by Prof. 

 Miall does not appear to exhibit the same character. 



A series of scales in the region of the mid-ventral line can 

 be traced posteriorly from a point between the fins to the 

 border of the specimen. From the mid-ventral region some 

 half-dozen series of scales extending diagonally and posteriorly 

 to the right are admirably seen. The shining surface, punctate 

 appearance, and characteristic shape of the scales are well 

 illustrated. 



The specimen is from the Kay-Shuttleworth collection and 

 is labelled : " Burnley, Lancashire, Middle Coal Measures." 



Part of a fin of Megalichthys (L.8328.) 



It may be noted that in part of a fin of M. hibbe7-ti in the 

 Manchester Museum from the Knowles Ironstone, Fenton, 

 (Ward collection), there is a large scale, probably a fulcrum, 

 near the base of the fin-lobe. Some convex scales are also 

 present in this specimen, and they form a feature of consider- 

 able interest, which is shared by some of the scales registered 

 under : — 



W.817 (Manchester Museum) Wild Collection, Thin 

 Bed, Middle Coal Measures, Fulledge Colliery, 

 Burnley, Lancashire. 



W.817 is a collection of scales and other parts of M. hibberti, 

 and the well known punctate " ganoid " surface is seen in all 

 the scales. Some of them are very convex, and a crack 

 extends down the long axis in at least two cases. The con- 

 vexity seems to be related to the position of the scales, either 



