PISCES. ios 



ISCHN ACANTHUS (continued)— 



gracilis (Egerton), J. Powrie, ibid., p. 419; R. H. Traquair, 



Geol. Mag. [3] vol. v, 188S, p. 512. 

 Diplacanthus gracilis, P. M. G. Egerton, Figs, and Descript. 



Brit. Organic Remains, dec. x (Mem. Geol. Surv., 1861), 



p. 69, pi. ix ; J. Powrie, Trans. Edinb. Geol. Soc, vol. i 



(1870), p. 290, pi. x, f. 2. 

 Ictinocephalus granulalus, D. Page, Rep. Brit. Assoc, 1858 



(1859), Sect., p. 105 (name only). T. {Ictinocephalus.) 



LOC. L. Old Red Sandst.; Forfarshire. [Fish ; J. Powrie Coll.] 



ISCHYODUS, P. M.G. Egerton, Proc. Geol. Soc, vol. iv(i843), p. 155. 

 agassizi, Egerton. v. Edaphodon agassizi. 

 agassizi, Bensted (non Egerton . v. Ischyodus thurmanni. 



beaumcnti, P. M. G. Egerton, Proc. Geol. Soc, vol. iv (1843), 



pp. 155, 156. 

 Chimccra (Ischyodon) beaumontii, L. Agassiz, Poiss. Foss., vol. iii 



(1843), p. 346. 

 Ischyodus, P. M. G. Egerton, Quart. Journ. Geol. Soc, vol. iii, 



1847, p. 35i, pl- xiii, f. 1. 

 LOC. Kim. Clay; Dorsetshire. [Teeth; Brit. Mus.] 



brecirostris, Agassiz. v. Ischyodus thurmanni. 



bucklandi. P. M. G. Egerton, Proc. Geol. Soc, vol. iv (1843), 



pp. 153, 156. 

 Chimcera (Ischyodon) bucklandi, L. Agassiz, Poiss, Foss., vol. 



iii (1843), p. 343, pl. xl c, f. 19. 

 Ganodus bucklandi, P. M. G. Egerton, Quart. Journ. Geol. Soc, 



vol. iii, 1847, p. 352 ; J. Morris, Cat. Brit. Foss., 1854, p. 326. 

 LOC. Stonesfield Slate. [Mandib. tooth ; Brit. Mus.] 



colei : Chimcera (Ganodus) colei, L. Agassiz, Poiss. Foss., vol. iii 

 (1843), p. 346, pl. xl, f. 8-10. 

 Ganodus colei, J. Morris, Cat. Brit. Foss., 1854, p. 327. 

 LOC. Stonesfield Slate. [Mandib. and palatine teeth ; Brit. Mus.] 



eg-ertoni 'Buckland), P. M. G. Egerton, Proc Geol. Soc, vol. iv 



(1843), p. 156; J. Morris, Cat. Brit. Foss., 1854, p. 330; 



J. Phillips, Geol. Oxford, 1871, p. 306, pl. xii, f. 24. 

 Chimcera egertunii, W. Buckland, Proc. Geol. Soc, vol. ii ( 1S35), 



p. 206, and Phil. Mag. [3] vol. viii, 1836, p. 5. 

 Chimcera (Ischyodoii) egertoni, L. Agassiz, Poiss. Foss., vol. iii 



(1843), p. 340, pl. x\c, f. 1-10. 

 LOC. Kim. Clay ; Oxfordshire and Dorsetshire. [Teeth ; Oxford 



Mus.] 



emarg'inatus, [-a] P. M. G. Egerton, Proc. Geol. Soc, vol. iv 

 (1843), pp. 154, 156. 

 Ganodus emarginatus, J. Morris, Cat. Brit. Foss., 1854, p. 327. 

 LOC. Stonesfield Slate. [Mandib. tooth ; Brit. Mus.] 



