170 BRITISH FOSSIL VERTEBRATA. 



PTYCHODUS {continued)— 



gibbevulus, Agassiz. v. Protosphyrasna (fins of). 



latissimus, L. Agassiz, Poiss. Foss., Feuill., p. 54 (1835), and 



vol. iii (1843), p. 157, pi. xxv a, f. 1-6 (? f. 7, non f. 8), pi. 



xxv A, f. 24-26; R. Owen, Rep. Brit. Assoc, 1838 (1839), 



p. 140, and Odontogr. (1840), descr. to pi. xvii, f. 1, 2 ; J. 



Morris, Cat. Brit. Foss., 1854, p. 342 ; O. Rees, Proc. Geol. 



Assoc, vol. vii (1873), p. 117 ; A. S. Woodward, Cat. Foss. 



Fishes B. M., pt. i, 1889, p. 147. [See also P. mammillaris 



and P. polygyrusi] 

 ' Palate of Unknown Fish,' J. Parkinson, Organic Remains, 



vol. iii, 181 1, p. 262, pi. xix, f. 18. 

 'Tooth allied to DiodonJ G. A. Mantell, Foss. S. Downs, 1822, 



p. 231, pi. xxxii, f. 19. 

 Ptychodus paucisulcatus, F. Dixon, Geol. Sussex, 1850, p. 363, 



pi. xxx, f . 3 ; J. Morris, Cat. Brit. Foss., 1854, p. 342 ; A. S. 



Woodward, Ouart. Journ. Geol. Soc, vol. xliii, 1887, p. 127, 



pi. x, f. 12. [tooth ; Brit. Mus.] 

 LOC. U. and L. Chalk ; Sussex, Kent, Surrey, Suffolk, Hertford- 

 shire, and Wiltshire. [Teeth ; ? Brit. Mus. {pars).'] 



mammillaris, L. Agassiz, Poiss. Foss., Feuill., p. 54 (1 835), and 



vol. iii (1S39), p. 151, pi. xxv^, f. 12-20 (? f. 11) ; F. Dixon, 



Geol. Sussex, 1850, p. 36 r, pi. xxx, f. 6, pi. xxxi, f. 4 ; 



J. Morris, Cat. Brit. Foss., 1854, p. 342 ; A. S. Woodward, 



Cat. Foss. Fishes B. M., pt. i, 1889, p. 133. 

 Ptychodus decurrens, L. Agassiz {crrore), Poiss. Foss., vol. iii 



" (1839), P- 154, pL xxv ^,f. 3, 5. 

 Ptychodus altior, L. Agassiz, Poiss. Foss., Feuill., p. 54 (1835), 



and vol. iii (1839), p. 155, pi. xxv b, f. 9, 10. 

 Ptychodus latissimus, F. Dixon {erf ore), Geol. Sussex, 1850, 



pi. xxxi, f. 3. 

 'Tooth allied to Diodon,' G. A. Mantell, Foss. S. Downs, 1822, 



p. 231, pi. xxxii, f. 17, 18, 20, 21, 25, 27, 29. 

 LOC. U. and L. Chalk ; Sussex, Kent, Surrey, and Wiltshire. 



[Teeth; Brit. Mus. {pars,.] T. 



inurginalis, named variety of P. polygyrus (L. Agassiz, Poiss. 

 Foss., vol. iii (1839;, p. 157;. 



mortoni, G. A. Mantell, Descript. Cat. Geol., etc., Mus. Sussex 

 Sci. and Lit. Inst. Brighton, ed. 5 (1836;, p. 27 ; S. G. 

 Morton, Journ. Acad. Nat. Sci. Philad., vol. viii (1839), 

 p. 215, pi. xi, f. 7 ; J. Morris, Cat. Brit. Foss., 1854, p. 342. 

 Recorded from Chalk of Sussex by F. Dixon, Geol. Sussex, 

 1850, p. 364, pi. xxxi, f. 6, 7, but doubtful ; similar tooth in 

 Oxford Museum from Chalk of Winchester. 



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

 1889, p. 146, pi. v, f. 4-6. 

 LOC. L. Chalk ; Kent. [Teeth ; Brit. Mus.] 



