ELONICHTHYS STRIATULUS. 89 



believe that the species is new to science, and I have consequently named it Elonichthys 

 denticulatus. 



Geological Position and Locality. — From the base of the Pendleside Series (Lower 

 Carboniferous), near Holywell, Flintshire. 



15. Elonichthys striatulus, Traqiiair. Plate XX, figs. 3 — 5. 



1904. Eloniciitiiys striatulus, Traqiiair. Summ. Progr. Geol. Survey for 



1903, p. 121. 



1907. — — Traqiiair. Trans. Hoy. Soc. Edinb., vol. xlvi, 



pt. i (no. 4), pp. 107, 108, pi. i, 

 figs. 2—5. 



Specific Characters. — Attaining a length of about three inches ; length of head 

 contained about four times in the total ; scales of the flank marked with fine parallel 

 transverse ridges, which often appear double, the two divisions uniting close to the 

 posterior margin of the scales ; paired fins badly preserved ; rays of median fins slender 

 and distantly articulated ; fulcra few, elongated and very oblique. 



Description. — The specimen represented in PI. XX, fig. 3, is from Glencartholm, 

 Eskdale, and measures nearly three inches in length, being tolerably perfect in contour, 

 save that the dorsal fin is deficient. The length of the head is contained about four 

 times in the total ; its superficial bones are sculptured with comparatively coarse and 

 distant ridges ; the maxilla is striated in its post-orbital expanded portion, tubercled 

 along its dentary margin ; the opercular bones are not distinguishable. The flank scales 

 (fig. 4) have each five or six fine but prominent transverse ridges which end in points at 

 the posterior margin, but frequently some of the upper ridges are double, the two divisions 

 uniting behind so as to form the point in question. I am unable to decide whether 

 those ridge-points project beyond the margin so as to form actual denticulations. In the 

 region of the tail (fig. 5) those ridges become more oblique in their direction across the 

 scale; and the scales of the caudal body prolongation, both median and lateral, are 

 highly ornate up to the very extremity. Only feeble indications of the paired fins are 

 visible, but they seem to have been large and with very slender rays. The dorsal is 

 not preserved, but the anal is in its place and shows the normal triangular acuminate 

 contour ; its rays are very slender, smooth and distantly articulated, and its fulcra are 

 peculiar in being comparatively few in number; much elongated, slender, and very 

 oblique. A similar condition characterises the rays and fulcra of the lower lobe of the 

 caudal fin. 



Another specimen, from Gullane, in East Lothian, is slightly smaller, but shows the 

 same essential features as the above-described example from Eskdale. It is interesting 

 as showing the greater part of the dorsal fin, and in this way it helps to complete our 

 general idea of the external contour of the fish. The apex of the dorsal fin is cut off by 



