﻿1 4 ACANTHODII. 



38514-15. Crushed specimen, and another fish, lateral aspect ; 

 Turin Hill, Forfar. Purchased, 1864. 



41362. Very small fish ; Turin Hill. Purchased, 1869. 



46307. Four specimens ; Turin Hill. Purchased, 1875. 



P. 126, P. 140. Contorted and crushed small individual, in counter- 

 part, and an imperfect large fish ; Turin Hill. 



Purchased, 1880. 



P. 1331. Two specimens; Turin Hill. Egerton Coll. 



P. 5081. Well-preserved specimen ; Turin Hill. 



Presented by J. E. Lee, Esq., 1885. 



Acanthodes affinis, Whiteaves. 



1887. Acanthodes mitchelli(?) ox Acanthodes affinis, J. F. Whiteaves, 

 Trans. Roy. Soc. Canada, vol. iv. sect. iv. p. 107. 



1889. Acanthodes affinis, J. F. Whiteaves, Trans. Roy. Soc. Canada, 

 vol. vi. sect. iv. p. 91, pi. v. fig. 1. 



1890. Mesacanthus affinis, R. H. Traquair, Geol. Mag. [3] vol. vii. 

 p. 16. 



Type. Nearly complete fish ; Geological Survey of Canada, 

 Ottawa. 



A very small species, about 0*04 in length. Body elongated and 

 slender, the greatest depth being contained about five times in the 

 total length. Pelvic fins large, situated somewhat nearer to the 

 anal than to the pectorals ; pelvic spines more than half as large as 

 the pectorals, and about equal in size to the anal. Dorsal spine 

 slightly behind the anal, scarcely larger than the latter. 



Form. Sf Loc. Upper Devonian : Scaumenac Bay, P. Q., Canada. 



P. 5975. Typical specimen, 0*03 in length. Purchased, 1889. 



Two small Acanthodian fishes of the same type as the preceding 

 are also known from supposed Devonian strata in Siberia, but there 

 are no examples in the Collection. They are described as follows : — 



Acanthodes lopatini, J. V. Rohon, Mem. Acad. Imp. Sci. St. Peters- 

 bourg, [7] vol. xxxvi. no. 13 (1889), p. 3, pi. i. figs. 1-3, 

 6-9, 11, 12, 15-17. — Devonian (?) ; Isyndschul, near 

 River Seresch, Govt, of Tomsk, Siberia. [Imperfect fishes ; 

 Imperial Academy of Sciences, St. Petersburg.] 



Acanthodes parvulus, J. V. Rohon, ibid. p. 7, pi. i. fig. 5. — Ibid. 

 [Imperfect fish, displaying caudal region ; Imperial Acad- 

 emy of Sciences, St. Petersburg.] 



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