172 BRITISH FOSSIL VEETEBRATA. 



PTYCHOLBPIS {continued)— 



gracilis, J. W. Davis, Ann. Mag. Nat. Hist. [5] vol. xiii, 1884, 

 p. 335, pi. x. 

 LOC. L. Lias ; Lyme Regis. [Fish ; J. W. Davis Coll.] 



minor, P. M. G. Egerton, Figs, and Descript. Brit. Organic 

 Remains, dec. vi (Mem. Geol. Surv., 1852), no. 7, pi. vii ; 

 J. Morris, Cat. Brit. Foss., 1854, p. 342. 



LOC. L. Lias ; Barro\v-on-Soar, Leicestershire. [Fishes ; Brit. 



Mus.] 



FYCKOOI7S, L. Agassiz, Poiss. Foss., vol. i (1833), pi. G, f. 1 

 (name and fig. only), and ibid., vol. ii, pt. ii (1843), P- 183 ; 

 J. J. Keckel, Denkschr. k. k. Akad. Wiss. Wien, math.- 

 naturw. CI., vol. xi, 1856, p. 204. 

 PERIODUS, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), P- 201 - 

 angustus, Agassiz. v. Ccelodus angustus. 

 biserialis, Agassiz. v. Mesodon biserialis. 



bowerbanki, P. M. G. Egerton, Geol. Mag. [2] vol. iv, 1877, p. 52, 



pi. iii, f. 2. 

 LOC. London Clay; Sheppcy. [R. mandib. dentition; Brit. Mus.] 

 bucklandi, Agassiz. v. Mesodon bucklandi. 

 cretaceus, Agassiz. v. Ccelodus cretaceus. 

 did unius, Agassiz. v. Mesodon bucklandi. 

 discoideS) Agassiz. v. Mesodon discoides. 

 clongatus, Agassiz. v. Ccelodus angustus. 

 Jiugii. L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), P- I95> pi. Ixxii a, 



f. 49-54. Erroneously recorded from Stonesfield Slate by 



J. Morris, Cat. Brit. Foss., 1854, p. 342. 

 latirostris, Agassiz. v. Mesodon trigonus. 

 liassicus, Egerton. v. Mesodon liassicus. 

 mantelli, Agassiz. v. Ccelodus mantelli. 

 inarginalis, Agassiz. v. Gyrodus cretaceus. 

 mierodon, Agassiz. v. Ccelodus mantelli. 



minor, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), P- 2 °° (name 



only). ? = Gyrodus minor, Agassiz. 

 obtusus, Agassiz. t\ Mesodon bucklandi. 

 oralis, Agassiz. v. Mesodon bucklandi. 



pachyrhinus, P. M. G. Egerton, Geol. Mag. [2] vol. iv, 1877, 

 p. 54, pi. iv, f. 1. 2. 

 LOC. London Clay ; Sheppey. [Vomer ; Brit. Mus.] 

 pagoda, Blake. 7: Mierodon pagoda. 

 parallelus, Dixon, v. Ccelodus parallelus. 

 parvus, Agassiz. r\ Mesodon rugulosus. 

 quiiicuncialis, Blake, v. Mierodon quincuncialis. 



