PISCES. 165 



PSEPHOOUS, J. Morris and G. E. Roberts {ex Agassiz, MS.), 

 Quart. Joum. Geol. Soc, vol. xviii, 1862, p. 101 ; R. H. Tra- 

 quair, Trans. Geol. Soc. Glasgow, vol. vii (1884), p. 396, pi. xvi 

 (reprinted, Geol. Mag. [3] vol. ii, 1885, p. 337, pi. viii). 



HELODUS, L. Agassiz, Poiss. Foss., vol. iii (1838), p. 104 {pars). 



LOPHODUS, H. Romanovsky, Bull. Soc. Imp. Nat. Moscou, 

 vol. xxxvii, 1864, pt. ii, p. 160 {pars). 



Aspidodus, J. S. Newberry and A. H. Worthen, Pal. Illinois, 

 vol. ii, 1866, p. 92. 



T.ENIODUS, O. St. John and A. H. Worthen, Pal. Illinois, vol. vii, 

 1883, p. 75 {pars). 



dubius, A. S. Woodward, Cat. Foss. Fishes B. M., pt. i, 1889, 

 p. 183, pi. vi, f. 13 (?f. 12). 

 LOC. Carb. Limest. ; Oreton, Shropshire. [Tooth ; Brit. Mus.] 



laevissimus (Agassiz), A. S. Woodward, ibid., 1889, p. 181, pi. vi, 



f. 16. 

 Helodus Icevissimus, L. Agassiz, Poiss. Foss., vol. iii (1838), 



p. 104, pi. xiv, f. 1— 14 {11011 f. 1 5) (lettered Psammodus on plate). 

 LOC. L. Carb. (Bone-bed in L. Limest. Shales) ; Avon Gorge, 



near Bristol. [Teeth ; Bristol Mus.] 



mag'nus (M'Coy), J. Morris and G. E. Roberts, Quart. Joum. Geol. 



Soc, vol. xviii, 1862, p. 101 ; J. W. Davis, Trans. Roy. Dublin 



Soc. [2] vol. i (1883), p. 439, pi. Iv, f. 1-14, and Geol. Mag. 



[3] vol. iii, 1886, p. 151 ; R. H. Traquair, Trans. Geol. Soc. 



Glasgow, vol. vii (1884), p. 392, pi. xvi (reprinted, Geol. Mag. 



[3] vol. ii, 1885, p. 337, pi. viii) ; A. S. Woodward, Cat. Foss. 



Fishes B. M., pt. i, 1889, p. 177. 

 Cochliodus niagnus, L. Agassiz, Poiss. Foss., vol. iii (1843), p. 174 



(name only) ; J. E. Portlock, Rep. Geol. Londonderry, 1843, 



p. 466, pi. x'wa, f. 4 (fig. only) ; J. Morris, Cat. Brit. Foss., 



1854, p. 322 ; F. M'Coy, Brit. Palceoz. Foss. (1855), p. 622. 

 Helodus planus, L. Agassiz, Poiss. Foss., vol. iii (1843), P- l 73 



(name only); J. Morris, Cat. Brit. Foss., 1854, p. 328; F. 



M'Coy, Brit. Palaeoz. Foss. (1855), p. 631, pi. iii I, f. 12-15. 

 Helodus planus = Cochliodus mag?ius, J. E. Portlock, Rep. 



Geol. Londonderry, 1843, p. 4^2. 

 Helodus didymus, L. Agassiz, Poiss. Foss., vol. iii (1843), P- 1 73 



(name only) ; J. Morris, Cat. Brit. Foss., 1854, p. 328 ; F. 



M'Coy, Brit. Paheoz. Foss. (1855), p. 630, pi. iiil, f. 18-20 



{pars). 

 Helodus Icevissimus, F. M'Coy, Brit. Palaeoz. Foss. (1855), p. 



630 (pars). 

 Helodus rudis, F. M'Coy, Ann. Mag. Nat. Hist. [2] vol. ii, 1848, 



p. 123, and Brit. Palaeoz. Foss. (1855), p. 631, pi. iii kl, f. 4 ; 



J. Morris, Cat. Brit. Foss., 1854, p. 328 ; J. W. Davis, Trans. 



Roy. Dublin Soc. [2] vol. i (1883), p. 457, pi. lix, f. 11. 

 Lophodus lavissimus, J. W. Davis, ibid. (1883), p. 404, pi. Ii, 



f. 18 (pars). 



