FISHES OF THE DEVONIAN AGE. 39 
The accompanying wood-cut, copied from my notes' on Machceracan- 
thus, is an imperfect representation of a very interesting specimen found by 
Professor Hopkins in the Corniferous limestone near Auburn, N. Y. This 
represents a pair of spines of Macharacanthus peracutus which occupy nearly 
the relative position they would hold if they were connected with the pec- 
toral fins, and these had been brought near together. The fact of finding 
such a pair of spines in such relations practically demonstrates that they 
were connected with the paired fins. 
As I have remarked elsewhere, Macharacanthus occurs in the Devonian 
limestones of Europe as well as in America, and Barrande’s so-called Ctena- 
canthus Bohemicus is nothing else than a species of Macharacanthus closely 
allied to our JZ. major.’ 
Macu@racanruus mMAsor Newb. 
Plate XXIX, Figs. 4, 4% 
Macheracanthus major N.; Bull. Nat. Inst., 1857, p. 6. 
Paleontology of Ohio, vol. 1, p. 304, Pl. XXV, Fig. 2. 
Spine large and strong, length twelve to twenty inches; greatest 
breadth one and a half inches; wing of concave border widest; point moder- 
ately acute; base narrowed and compressed, with a rough and irregular 
termination; upper surface lightly striated longitudinally, central axis pro- 
jecting in an imperfectly rounded ridge, one-half an inch wide, elevated 
three-tenths of an inch above the wings; under surface of central axis 
marked by about ten distinct longitudinal carinations; axis five-eighths 
of an inch wide, flattened, obliquely angled at sides, rising one-quarter of 
an inch above the wings; base unequally sloped off where it was set 
obliquely into the integuments. At this point the carinations of the upper 
part become obsolete; sides of axis above and below punctate. 
Formation and locality: Corniferous limestone; Columbus, Delaware, 
and Sandusky, Ohio. 
‘Paleontology of Ohio, vol. 1, p. 303. 
>See A. Roemer, Beitriige, p. 26, Pl. IX, and Kayser, Die Fauna der iiltesten Devon-Ablagerungen 
des Harzes, Abhandl., etc., vol. 2, Heft 4, p. 4; Atlas, Pl. XXXV, Fig. 12. 
