PISCES. 89 
GYRACANTHWUS nobilis (con/inued)— 
Gyracanthus tuberculatus, R. H. Traquair (#0 Agassiz), Geol. 
Mag. [2] vol. viii, 1881, p. 35, and ? T. Stock, Trans. Edinb. 
Nat. Field Club, vol. i (1883), p. 50. 
Gyracanthus formosus, R. H. Traquair (#0n Agassiz), Geol. 
Mag. [2] vol. ix, 1882, p. 542. 
Loc. M. Carb. Limest.; Edinburgh and Fifeshire. [Spine ; 
R. H. Traquair Coll.] 
obliquus, F. M‘Coy, Ann. Mag. Nat. Hist. [2] vol. ii, 1848, p. 117, 
and Brit. Palwoz. Foss. (1855), p. 629, pl. iii K, f. 13, 14; J. 
Morris, Cat. Brit. Foss., 1854, p. 327. 
Loc. L. Carb.; Moyheeland. [Spine ; Woodwardian Mus.]} 
ornatus, L. Agassiz, Poiss. Foss., vol. iii (1843), p. 177 (name 
only). 
Loc. Coal-Meas. ; Wales. [Spine.] 
tuberculatus, Agassiz. wv. Gyracanthus formosus. 
youngi, [-ii] R. H. Traquair, Geol. Mag. [2] vol. x, 1883, p. 543, and 
Ann. Mag. Nat. Hist. [5] vol. xiii, 1884, p. 47, and Proc. 
Roy. Phys. Soc. Edinb., vol. viii, 1884, p. 103. 
Loc. M. Carb. Limest.; Scottish Coalfield. [Spine; R. H. 
Traquair Coll.] 
sp., R. Howse, Trans. Tyneside Nat. Field Club, vol. i, 1848, 
p. 237 ; assigned to G. formzosus by W. King, Permian Foss. 
(Pal. Soc., 1850), p. 221. 
Loc. L. Permian; Westoe. [Spine ; Newcastle-upon-Tyne Mus. | 
(dermal tubercles of). wv. Mitrodus quadricornis. 
GYRODWS, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), p. 223; 
R. Owen, Rep. Brit. Assoc., 1838 (1839), Sect., p. 143; 
J. J. Heckel, Denkschr, k. k. Akad. Wiss. Wien, math.- 
naturw. Cl., vol. xi, 1856, p. 200. 
SPHZRODUS, L. Agassiz, Poiss. Foss., vol. ii, pt. i (1833), p. 15, 
and 77d., pt. ii (1843), p. 209 (pars). 
angustus, Agassiz. v. Cclodus angustus. 
coccoderma, P.M. G. Egerton, Quart. Journ. Geol. Soc., vol. xxv, 
1869, p. 383, woodcuts 3, 4. 
Loc. Kim. Clay ; Kimeridge. [Vomer; Mus. Pract. Geol.] 
conicus, Dixon. v.Gyrodus cretaceus. 
cretaceus, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), p. 233, 
pl. Ixix a, f. 13; F. Dixon, Geol. Sussex, 1850, p. 370, pl. 
xxx, f. 15 ; J. Morris, Cat. Brit. Foss., 1854, p. 328; A. S. 
Woodward, Proc. Geol. Assoc., vol. x (1888), p. 308. 
Gyrodus mammillaris, L. Agassiz, Poiss. Foss., vol. ii, pt. 1i 
(1843), p. 236, pl. Ixxili a, f. I, 2. 
Pycnodus marginalis, L. Agassiz, t67d., pt. ii (1843), p. 199- 
[Tooth ; o/vz Manchester Mus.] 
