156 GANOID FISHES OF THE CARBONIFEROUS FORMATION. 



we have now before us a larger example than the previous one. I figure this specimen 

 on account of the perfect caudal extremity which it displays. The fin is deeply cleft 

 and inequilobate, the prolongation of the body-axis along the upper lobe l)eing propor- 

 tionately stronger than in the type specimen of the genus (Rh. ornatissimus) . 



Observations. — I have placed this species in BhadinichtJn/s owing to its resem- 

 blance in external form to Bh. hrevis, although the condition of the pectoral fin cannot 

 be ascertained. I have alluded to the certain amount of resemblance whicli the 

 sculpture of the scales bears to that in Iih.ferox, but the greater proportional distance 

 between the anal and caudal fins in the latter suffices to distinguish tliem. 



Geological Position and LoralUi/. — Collected by the Geological Survey of Scotland 

 from shales belonging to the Calciferous Sandstone Series, exposed on the shore near 

 Gullane, in East Lothian. 



10. Rhadinichthys tubkrculatus, Truquair, Plate XXXV, figs. 1 — 3. 



EnAUiNiciiTHTS TUBERCULATCS, Traquciir. Trans. Roy. Soc. Ediub., vol. xxx, 



1881, p. 31. pi. iv, figs. 1—3. 

 _ —A. S. Woodward. Cit. Fosa. Fishes Brit. Mus., 



pt. ii, 1891, p. 4G9. 



Specific Characters. — Attaining an estimated length of over 8 inches ; fins large ; 

 scales with a ridged tuberculate ornament, and not denticulated posteriorly ; caudal 

 body-))rolongation largely developed. 



Description. — The following description is taken from two specimens, one of which, 

 belonging to the Geological Survey of Scotland, was figured in my paper quoted above ; 

 the other, figured in PI. XXXV, fig. 1 of the present work, is in my own collection. 



The length of the first specimen is 7 inches from the tip of the snout to the bifurcation 

 of the caudal fin ; the extremity of the upper lobe of the tail is not preserved, otherwise 

 the length of the fish would probably be at least 8^ inches. The length of the head is 

 2 inches, equalling the greatest depth of the body just in front of the ventral fins and 

 being contained rather more than four times in the estimated total. The depth of the 

 tail-pedicle is f inch. 



The head is much crushed and its bones badly preserved ; its structure is, however, 

 clearly seen to be typically Palaeoniscoid with very oblique suspensorium, anteriorly 

 placed orbit, wide gape and powerful jaws. The operculum seems somewhat long 

 and narrow, the suboperculum square-shaped. No teeth are visible. 



The bones of the head being almost everywhere seen only from their internal 

 surfaces, their external ornamentation is but scantily exhibited. Evidences of a 

 minutely tubercular sculpture, the tubercles being sometimes rounded, sometimes 

 slightly elongated or confluent, are seen on the parietal and ethmoidal regions of the 



