﻿DIPIACANTHIDiE. 



31 



elongated, the greatest depth being contained more than five times 

 in the total length. Spines comparatively straight and narrower 

 than in the type species ; longitudinal ridges usually smooth. 

 Pectoral fin-spines straight, scarcely larger than the first dorsal ; 

 five pairs of intermediate ventral spines, separated by a distinct 

 interval from the pelvic fin-spines ; the latter at least two thirds as 

 long as the pectoral pair. First dorsal spine shorter and stouter 

 than the second, situated midway between the pectoral and pelvic 

 pairs : second dorsal spine very slightly in advance of the anal, 

 about equal to this in size. Scales smooth. 



This is the type species of EutTiacanthus, Powrie. 



Form. <$f Log. Lower Old Eed Sandstone : Forfarshire. 



P. 1337. Imperfectly preserved trunk, wanting the head and tail, 

 but exhibiting the situation and proportions of the spines ; 

 Forfar. Egerton Coll. 



Climatius grandis (Powrie). 



1870. Euthacanthus grandis, J. Powrie, Trans. Edinb. Greol. Soc. vol. i. 

 p. 292, pi. xii. fig. 6. 



Type. Fragments of fish ; collection of James Powrie, Esq., Res- 

 wallie. 



A very large species, attaining a maximum length of not less 

 than 0*6 (according to Powrie). Body much elongated. Spines 

 comparatively straight and narrower than in the type species ; lon- 

 gitudinal ridges usually smooth. Pectoral fin-spines straight, pro- 

 bably about equal to the first dorsal in size ; not less than four pairs 

 of intermediate ventral spines, separated by a distinct interval from 

 the pelvic fin- spines ; the latter at least two thirds as long as the 

 pectoral pair. First dorsal spine smaller than the second, situated 

 somewhat nearer to the pectoral than the pelvic pair ; second dorsal 

 spine slightly in advance of the anal, and much larger than the 

 latter. Scales of the flank in the abdominal region ornamented 

 with a few short horizontal striae in the anterior half ; other scales 

 mostly smooth. 



Form. <$f Log. Lower Old Red Sandstone : Forfarshire. 



38597. Crushed trunk of small individual, wanting head and 

 extremity of the tail, showing four pairs of intermediate 

 ventral spines and portions of the pelvic, anal, and dorsal 

 fin-spines ; Turin Hill, Forfar. 



Presented by James Poivrie, Esq., 1864. 



