THE GEOLOGICAL SURVEY OF SCOTLAND NEAR GULLANE. 109 



One fragmentary specimen has occurred, showing the head with a portion of the 

 front of the body, the scales of which are considerably mashed up together. However, 

 what can be seen of the ornamentation of these scales, along with the impressions of 

 the bones of the head, shows conclusively with what species we have to deal. 



Collected by Mr Macconochie in bed a. 



Rhadinichthys brevis, Traquair. PI. II. figs. 3-5. 



1877. Rhadinichthys brevis, R. H. Traquair, Proc. Roy. Soc. Edinb., vol. ix. p. 440. 

 1891. Rhadinichthys brevis, A. S. Woodward, Gat. Foss. Fishes Brit. Mm'., pt. ii. p. 462. 

 1901. Rhadinichthys brevis, R. H. Traquair, Geol. May. (4), vol. viii. p. 111. 



In the remarks appended to my original description of the species from the beds at 

 Wardie, I compared it specially with Rh. Geikiei, Traq., from Colinton. But as I have 

 since then adopted the view that Rh. Geikiei represents but a young stage of Rh. 

 carinatus, Agassiz, it is with the adult of the last-named species that the comparison 

 must be carried out. Compared, then, with R. carinatus, Rh. brevis is, as the name 

 implies, proportionally shorter, the unpaired fins are larger, the distance between the 

 commencement of the anal and that of the caudal is proportionally smaller, the ridges 

 on the cranial roof-bones are coarser, though in this latter respect there is some 

 variation in Rh. brevis. It is undoubtedly a good species, and occurs not only at the 

 original locality, Wardie, and here, at Gullane, but also in Fifeshire (Geol. Mag., t. cit. 

 ant., p. 111). 



Collected by Mr Macconochie from bed a ; — a slightly doubtful specimen has also 

 been obtained by Mr W. T. Gordon in bed b. 



Rhadinichthys elegantulus, Traquair. 



1881. Rhadinichthys Geikiei, R. H. Traquair, Trans. Roy. Soc. Edinb., vol. xxx. p. 25, pi. i. figs. 13-18. 

 1881. Rhadinichthys Geikiei, var. elegantulus, R. H. Traquair, ibid., p. 27, pi. ii. figs. 1-5. 

 1881. Rhadinichthys delicatulus, R. H. Traquair, ibid., p. 29, pi ii. figs. 6-9. 



1890. Rhadinichthys elegantulus (with var. delicatulus), R. H, Traquair, Proc. Roy. Soc. Edinb., 



vol. xvii. p. 398. 



1891. Rhadinichthys elegantulus. A. S. Woodward, Cat. Foss. Fishes Brit. Mus., pt. ii. p. 464. 



To this species I refer a small and not quite perfect specimen collected by 

 Mr Macconochie in bed a. I certainly cannot distinguish it from the Glencartholm 

 fish whose synonymy is given above. 



Rhadinichthys formosus, Traquair. PL I. fig. 6, PI. II. figs. 6-8. 



1904. Rhadinichthys formosus, R. H. Traquair, in Summary of Progress Geol. Survey for 1903, p. 122. 



The original specimen of this form is represented in PI. II. fig. 6 ; unfortunately 

 it is not perfect, as nearly the whole of the upper and a great portion of the lower lobe 

 of the caudal fin is lost. As it is, the length is 3f inches ; but when entire the fish 



