106 A. S. Woodicard — Belgian Neozoic Fish-teeth. 



teeth in the uppei* jaw, — an arrangement agreeing precisely with 

 that of the existing species of Odontaspis. Notwithstanding recent 

 criticisms/ we still venture to maintain that the form of the anterior 

 teeth proves the species to be referable to the last-mentioned genus, 

 and not to Lamua. 



OxyrMna nova, Winkler. 



1876. OxyrMna nova, T. C. Winkler, ArcMv. Mus. Teyler, vol. iv. p. 22, pi. ii. 

 fig. 8. 



This species may be accepted as well defined. 



OxyrMna Desori, Agassiz. 



1843. OxyrMna Desorii, L. Agassiz, Poiss. Foss. vol. iii. p. 282, pi. xxxvii. 

 figs. 8-13. 



1885. OxyrMna xiphodon, F. Noetling, Abh. Geol. Specialk. Preussen u. Thiiring. 



Staaten, vol. vi. pt. 3, p. 60, pi. iii. 

 1889. OxyrMtia Desorii, A. S. Woodward, Catal. Foss. Fishes Brit. Mus. pt. i. 

 p. 382. 



Some broad upper lateral teeth of this species occur in M. Houzeau's 

 collection, and resemble those figured by Noetling (under the name 

 of OxyrMna xiphodon) from the Samland Eocene. 



Lamna vertieaUs, Agassiz. PI. III. Fig. 2. 



1843. Lamna {Odontaspis) verticalis, L. Agassiz, Poiss. Foss. vol. iii. p. 294, 



pi. xxxvii «, figs. 31, 32. 

 1874. Otodus minutissimus, T. C. Winkler, Arehiv. Mus. Teyler, vol. iii. p. 297, 



pi. vii. fig. 2. 

 1876. Otodus parvus, T. C. Winkler, loc. cit. vol. iv. p. 7, pi. i. figs. 5, 6. 

 1876. Otodus minutissimus, T. C. Winkler, ibid. p. 23. 

 1880. Odontaspis mourloni, T. C. Winkler, loc. cit. vol. v. p. 77, figs. 1, 2. 

 ]883. Lamna {Odontaspis) verticalis., W. Dames, Sitzungsb. k. preuss. Akad. Wiss. 



Berlin, pt. i. p. 145, pi. iii.. figs. 8-10. 



1886. Odontaspis tninutissimus, F. JSfoetling, Sitzungsb. naturf. Freunde Berlin, 



p. 16. 



The large series of teeth of this species in M. Houzeau's collection 

 seems to justify the above synonymy suggested by Prof. Dames. 

 The form and proportions of the anterior teeth are characteristic of 

 the true Lamna ; and a typical lateral tooth is shown, of the natural 

 size, in PI. III. Fig. 2. 



The type specimens of L. verticalis are stated by Agassiz to have 

 been obtained from the London Clay of Sheppey, but the present 

 writer has not been able to identify teeth of this form from any 

 British Eocene deposit. 



Lamna Vincenti (Winkler). 



1876. Ofodtis Vincenti, T. C. Winkler, ArcMv. Mus. Teyler, vol. iv. p. 25, pi. ii. 

 figs. 9-10. : > if ^ 



The teeth of this species exhibit no characters by which they can 

 be separated from those of the true Lamna. They are well character- 

 ized by Winkler, though a refeience might have been made to the 

 supposed species, Lamna compressa of Agassiz. The latter comprises 

 teeth of very similar proportions but distinguished by the form of 



' J. W. Davis, Trans. Eoy. Dublin Soc. [2], vol. iv. (1890), pp. 373, 398. 



