ELONICHTHYS PULCHERRLMUS. 71 



The paired fins are not well seen in any specimen, but it is clear that the principal 

 rays of the pectorals are articulated up to their origins; in the ventrals the joints are 

 longer than broad, and distinctly striated longitudinally. The rays of the dorsal and anal 

 fins are slender, distantly articulated, the joints being smooth (fig. 8), or only showing 

 here and there a single longitudinal furrow. The caudal fin is small, deeply bifurcated ; 

 the rays of the lower lobe are smooth, with distant articulations, though in the upper 

 lobe they become rather closer. 



Observations. — This species is easily distinguished by its small delicate fins and small 

 scales, with their coarsely denticulated hinder margins. The original specimens are in the 

 <;ollection of the Geological Survey of Scotland, while the one here figured belongs to a 

 series in the Edinburgh Museum of Science and Art. It is also represented in the 

 British Museum. 



Geological Position and Locality. — All the specimens known are from the Lower 

 Carboniferous rocks (Calciferous Sandstone Series) exposed in the banks of the river 

 Esk, near Glencartholm, Duuifriessliire. 



(3. Elo.mchthys puLCHERiUMUs, Traqualr. Plate XII, figs. 1 — 4. 



Elonichthys puLCHj:inuMus, Traquair. Trans. Roy. Soc. Edinb.. vol. x.\x, 1881, 



p. 24, pi. i, figs. 9—12. 

 — — A. S. Woodicard. Cat. Eoss. Fishes Brit. Mu8., 



pt. ii. 1S91, p. 498. 



Specific Characters. — Shape deeply fusiform ; pectoral fins with their principal rays 

 articulated up to their origins ; median fins rather large, their rays being of medium 

 coarseness and having their joints rather longer than broad, and distinctly striated ; 

 scales relatively small, highly ornate over the whole body, the ornament consisting of 

 close delicate but sharply defined ridges which pass transversely on the upper and 

 posterior part of the flank scales obliquelv across the surface, and end in tine denticu- 

 lations of the hinder margin, and on the posterior scales have a tendency to reticulation. 



Description. — The deeply fusiform contour is well shown in the specimen figured on 

 PI. XII, fig. 1, which measures five and a half inches in length by one and three 

 ([uarters in greatest depth just at the commencement of the dorsal fin. These 

 proportions are not the result of distortion, as they are much the same in every 

 specimen which has been found. 



The bones of the cranial roof are in the type specimen shown to be covered with a 

 small close tuberculation, while the facial bones exhibit a ridged ornamentation, the lower 

 margin of the maxilla being, however, tuberculated. The teeth are, as is usual in this 

 genus, conical, sharp, and incurved, and of different sizes, larger and smaller. The form 



