THE DEVONIAN EOCKS OF CANADA. 91 



however, are described by McCoy as " nearly central, of moderate size, half their length 

 distant from the anal," whereas the ventrals of C. Canadensis are placed much farther for- 

 ward and are separated from the anal by a much larger space. The ventrals of C. mac- 

 rocephalus, too, are represented by McCoy as being rather nearer to the anal than they 

 are to the pectorals, bvit those of C. Canadensis are very much nearer to the pectorals than 

 they are to the anal. In C. Cummingiœ, according to Hugh Miller, " the large pectorals 

 almost encroach on the ventrals, and the ventrals on the anal hn," but this, as already 

 stated, is by no means the case with C. Canadensis. The dorsal fin of C. Canadensis, also, 

 is placed much farther backward than is that of C. Cummingiœ, and the anal farther 

 forward. 



Of this species, four well preserved specimens, two of which are nearly perfect, were 

 collected by Mr. Foord in 1880, and one of unusixally large size in 1881. 



Additional Notes on the Species from Scaumenac Bay. 



BoTHRiOLEPis Canadensis. 



PlericlUhys (Bothriolepis) Canadensis, Whiteaves, 1860. Am. Journ. Sc. and Arts, Third Ser., 

 Vol. XXI, p. 132. lb., Trans. Eoyal Soc. Can., 1886, Vol. IV, Sec. IV, p. 101, 

 Pis. VI-IX. 

 When the first part of the present communication was written, the writer unfortu- 

 nately had not access to Lahusen's paper on the genus Buthriolepis (Trans. Imp. Min. Soc. 

 St. Petersburg, 1879) nor to Trautschold's on Bothriolepis Panderi (Bull. Soc. Imp. Nat. 

 Moscou, Vol. IV, pt. 2, 1880.) As it has been clearly shewn by both of these writers, by 

 Zittel & Cope aud still more recently by Dr. Traquair, that Bothriolepis, Eichwald, is 

 quite distinct from Plerichlhys, Agassiz, the Canadian species must be definitely referred 

 to the former e-enus. 



&^ 



ACANTHODES AFFINIS, N. Sp. 



(Plate V, figs. 1 and la—/.) 



Acanthodes Mitchelli (?) Egerton. Whiteaves, 1887. Trans. Eoyal Soc. Can., Vol. IV, Sect. 

 IV, p. 107. 

 As there is some reason for supposing that this interesting little fish is distinct from 

 the A. Mitchelli of the Devonian rocks of Scotland, it is thought desirable to retain for 

 the former the name suggested for it in the fourth volume of the Transactions of this 

 Society, in which a detailed description of the species will be found. 



Phaneropleukon curtum. 



(Plates V, fig. 3, and X, fig. 1.) 



A fragment collected by Mr. Foord in 1881, in which only a part of the head is pre- 

 served, and which has already been referred to on page 83, gives some additional infor- 



