160 PISCES. 
Ctenacanthus denticulatus, F. McCoy, A. M. N. H. ser. 2, 1 
(1848), p. 116, and Contrib. Brit. Pal. (1854), p. 11, and Brit. 
Palzeoz. Foss. (1855), pl. 111 K, f. 16, p. 625. J. W. Davis, Trans. 
Roy. Dublin Soc. ser. 2, 1 (1883), pl. xliv, f. 4, 4 a, p. 338. Lower 
Carboniferous ; Monaduff. [Spine.] 
C’. distans, v. Acondylacanthus distans. 
C. heterogyrus, Agassiz, F. McCoy, Brit. Paleeoz. Foss. (1855), 
pl. ii 1, f. 32, (83 missing), p. 625. Carboniferous Limestone ; 
Armagh. [Spine.] 
Ctenoptychius serratus (Owen), F. McCoy, Brit. Palseoz. Foss. 
(1855), pl. i 1, f. 21—23, p. 626. Carboniferous Limestone ; 
f. 21, 22 from Armagh, f. 23 from Derbyshire. [Teeth.] 
Deltodus aliformis (McCoy), J. W. Davis, Trans. Roy. Dublin 
Soe. ser. 2, 1 (1883), pl. li, f. 12, p. 431. Pacilodus aliformis, 
F. McCoy, A. M. N. H. ser. 2, 11 (1848), p. 129, and Contrib. 
Brit. Pal. (1854), p. 24, and Brit. Palseoz.. Foss. (1855), pl. 111 G, 
f. 10 (upper figure), p. 638. Carboniferous Limestone ; Derby- 
shire. [Tooth.] 
D. sublevis (Agassiz). Pecilodus sublevis, F. McCoy, Brit. Palzeoz. 
Foss. (1855), pl. 111 1, f. 7—9, p. 640. Pecilodus parallelus, F. 
McCoy, zbid. (1855), pl. ui 1, f. 6, 6 a, p. 640. Carboniferous 
Limestone; Armagh. [Teeth.] 
Deltoptychius acutus (Agassiz). Cochliodus acutus, F. McCoy, 
Brit. Paleeoz. Foss. (1855), pl. 111 1, f. 24, 24 a, p. 621 (missing). 
Cochliodus compactus, R. Owen, G. M. Iv (1867), pl. iv, f. 1. 
Carboniferous Limestone; Armagh. ['Teeth.] 
Dicrenodus dentatus (McCoy). Pristicladodus dentatus, F. 
McCoy, Brit. Palswoz. Foss. (1855), pl. im G, f. 2, 3, p. 642. 
Carboniferous Limestone ; Derbyshire.  ['Tooth.] 
D. goughi (McCoy). Pristicladodus goughi, F. McCoy, Brit. 
Paleeoz. Foss. (1855), pl. iii K, fi 11, p. 648. J. W. Davis, 
Trans. Roy. Dublin Soe. ser. 2, 1 (1883), pl. xlix, f. 27, p. 385. 
Carboniferous Limestone ; Kettlewell, Kendal. [Tooth.] 
Diplacanthus gibbus, v. D. striatus. 
Diplacanthus longispinus, Agassiz. D. perarmatus, F. McCoy, 
A. M. N. H. ser. 2, 1 (1848), p. 301, and Contrib. Brit. Pal. 
