THE GEOLOGICAL SURVEY OF SCOTLAND NEAR GULLANE. Ill 



I have placed this species in Rhadinichthys owing to its resemblance in external 

 form to Rh. brevis, although the condition of the pectoral fin cannot be ascertained. 

 From bed a, collected by Mr Macconochie, and also by myself. 



Nematoptychius Greenocki, Agassiz sp. 



1844. Pygopterus Greenockii, Agassiz, I'oiss. Foss., vol. ii. pt. ii. p. 78 (undefined). 



1867. Pygopterus Greenockii, R. H. Traquair, Trans. Roy. Soc. Edirib., vol. xxiv. p. 701, pi. xlv, 



figs. 1-7. 

 1872. Pygopterus elegans, C. W. Peach, Rep. Brit. Assoc, 1871, Trans. Sect., p. 109 (name only). 

 1875. Nematoptychius Greenockii, R. H. Traquair, Ann. Mag. Nat. Hist. (4), vol. xv. p. 258, pi. xvi. 



figs. 7-11. 

 1877. Nematopty chius gracilis, R. H. Traquair, Proc. Roy. Soc. Edirib., vol. ix. p. 262 ( = young form of 



N. Greenockii). 

 1877. Nematopty chius Greenockii, R. H. Traquair, Qu. Journ. Geol. Soc, vol. xxxiii. p. 577, and 



Ganoid Fishes Brit. Carb. Form. (Pal. Soc), pi. i. figs. 7-11. 



1890. Nematoptychius Greenocki, R. H. Traquair, Proc. Roy Soc. Edinb., vol. xvii. pp. 391, 398. 



1891. Nematoptychius Greenocki, A. S. Woodward, Gat. Foss. Fishes Brit. Mus., pt. ii. p. 458. 



Fragmentary specimens of this interesting Palseoniscid, so extensively distributed in 

 the Lower Carboniferous rocks of the East of Scotland, have been found in Bed b, both 

 by Mr Macconochie and by Mr W. T. Gordon. 



Family Platysomid^e. 



Genus Wardichthys, Traquair. 



Wardichthys cyclosoma, Traquair. PI. II. fig. 9. 



1875. Wardichthys cyclosoma, R. H. Traquair, Ann. Mag. Nat. Hist. (4), vol. xv. p. 262, pi. xvi. 



figs. 1-5. 

 1879. Wardichthys cyclosoma, R. H. Traquair, Trans. Roy. Soc. Edinb., vol. xxix. p. 361, pi. iv. 



figs. 12-15. 

 1881. Wardichthys cyclosoma, T. Stock, Ann. Mag. Nat. Hist. (5), vol. vii. p. 490. 

 1891. Wardichthys cyclosoma, A. S. Woodward, Gat. Foss. Fishes Brit. Mus., pt. ii. p. 535. 



The genus Wardichthys, with the single species cyclosoma, was instituted by me 

 in 1875 for a small Platysomid fish from the Lower Carboniferous shales, exposed at 

 Wardie beach, near Edinburgh. Only a single specimen was then known, and of this 

 I gave a minute description in the Annals and Magazine of Natural History for April 

 of the year named. Again, in my Essay on the " Structure and Affinities of the 

 Platysomidse," published in the Transactions of the Royal Society of Edinburgh for 

 1879, I recapitulated the principal characters of the genus, and showed that of all the 

 generic forms of Platysomidae it was most nearly allied to Mesolepis. 



TRANS. ROY. SOC. EDIN., VOL. XLVI. PART I. (NO. 4). 16 



