112 A. S, Woodward — Belgian Neozoic Fish-teeth. 



internal bulging of the root very prominent, and its branches meeting 

 at an obtuse angle ; sigmoidal curvature and internal bulging of 

 root also retained in the more posteriorly situated teeth but less 

 conspicuous. 



The writer has not observed teeth of this form in any collection 

 except that from the " Craie brune " of Ciply, and they are specifi- 

 cally named in honour of their discoverer. 



Lamna crassa (Agassiz). PI. III. Fig. 9. 



1843. Otodus crassus, L. Agassiz, Poiss. Foss.. toI. iii. p. 271, pi. xxxvi. figs. 29-31. 

 1854. Otodus crassus, V. KiprijanofE, Bull. Soc. Imp. Nat. Moscou, pt. ii. p. 384, 



pi. ii. figs, 4-20. 

 1889. Lamna crassa, A. S. Woodward, Catal. Foss. Fishes Brit. Mus. pt. i. p. 400. 



A number of teeth in M. Houzeau's collection are indistinguish- 

 able from those of this species, and one fine example is shown of 

 the natural size in PI. III. Fig. 9. The occurrence of the species in 

 the Lower Danian of Ciply is of some interest, since it is met 

 with only in a much lower horizon (Cenomahian) in the more 

 Eastern areas of Bavaria and Eussia. 



Coi-ax pristodontus, Agassiz. PL III. Figs. 10-16. 



1843. Corax pristodontus, L. Agassiz, Poiss. Foss. vol. iii. p. 224, pi. xxvi. 



figs. 9-13. 

 1889. Corax pristodontus, A. S. Woodward, Catal. Foss. Fishes Brit. Mus. pt. i. 



p. 423. 



The teeth described as Corax pristodontus have long been known 

 to characterize nearly all Upper Senonian and Danian formations ; 

 but no discovery of a series of naturally associated teeth seems to 

 have been hitherto recorded. M. Houzeau, however, has now met 

 with fourteen teeth of this form in the " Craie brune phosphatee " 

 of Ciply associated in such a manner as to leave little doubt that 

 they pertained to a single mouth. Seven of the specimens are 

 shown, from the outer aspect, in Ph III. Figs. 10-16, and it is 

 interesting to observe how constant are the specific characters of the 

 teeth, notwithstanding their variations in shape. The root is large 

 in each, the anterior margin of the crown exhibits its gibbous 

 curvature, and the posterior margin is always either destitute of the 

 notch so characteristic of other species or only feebly excavated. 



CSIMJEROIDEI. 



Elasmodus Greenoughi, Agassiz. PI. III. Fig. 17. 



1843. Elasmodus Greenovi, Sir P. Egerton, Proc. Geol. Soc. Tol. iv. p. 156 



(name only). 

 1843. Elasmodus Greenoughii, L. Agassiz, Poiss. Foss. vol. iii. p. 350, pi. xl. 



figs. 11-16. 

 1891. Elasmodus Greenoughi, A. S. Woodward, Catal. Foss. Fishes Brit. Mus. 



pt. ii. p. 90. 



M. Houzeau has discovered in the " Poudingue de la Malogne " 

 several fragmentary teeth of Elasmodus agreeing not only in specific 

 characters but also in physical condition with the type specimens of 

 E. Greenoughi in the British Museum. The locality and horizon 

 of this species are thus demonstrated for the first time by the new 



