LABRID.E. 
547 
1907. Portion of concave (lower) plate; Sheppey. 
Egerton Coll. 
169. Fragment; Sheppey. Purchased, 1880. 
27614. Fragment provisionally referred to this species by Cocchi, 
loc. cit. pi. ii. fig. 15; Red Crag, Suffolk (derived from 
London Clay). Purchased, 1852. 
The pharyngeal dental plates of Pligllodus occurring in the 
London Clay are very variable in the relative proportions of the 
teeth, and have received many specific names. The following is an 
illustrative series : — 
T. 590. Imperfect convex (upper) pharyngeal plate, resembling the 
specimen in the Oxford Museum which is described and 
figured as Phyllodus planus by Agassiz, Poiss. Foss. vol. ii. 
pt. ii. (1839-44), p. 239, pi. lxix a. figs. 4, 5 : Sheppey. 
This specimen is described and figured by Cocchi, Ann. It. 
Mus. Fis. Firenze [2] vol. L (1866), p. 95, pi. i. fig. 4. 
Egerton Coll. 
41720. Nearly similar specimen ; Sheppey. Toulmin Smith Coll. 
38816. Fine convex (upper) plate, noticed by Agassiz, tom. cit. 
p. 240, as belonging to the same species as a specimen in 
Fig. 19. 
Phyllodus polyodus ; upper pharyngeal dentition, nat. size. 
the Oxford Museum described and figured as Phyllodus 
polyodus, Agassiz, tom. cit. p. 240, pi. lxix a. figs. 6, 7 , 
Sheppey. Bouierbanh Coll. 
591, Larger, narrower specimen referred to P. polyodus by Cocchi, 
loc cit. p. 107, pi. iii. fig- 8 ; Sheppey. Egerton Coll. 
2x2 
