PLATE XLVI. 



Fig. Page. 



1. Si/)ircko(his fliihrisunisis (Mackie) ; dentition of one jaw, twice nat. size, 



with six teeth, of the series indicated by nnmbers, enlarged four 

 times. — Chalk; Sussex. Willett Collection, Brighton Museum. 218. 



2. Ditto ; remains of anterior part of skeleton, seen from loelow, nat. size. 



— Zone of Ilulastcr suhglobusn.s ; Burham, Kent. Mrs. Smith's 

 Collection (B. M. no. 49032). jx-f., pectoral arch ; i, first vertebral 

 centrum. Also 2 (7, shagreen, eight times nat. size, occurring on 

 jaws from same zone at Dover ; Gardner Collection (B. M. no. 47287). 219. 



3. Si/ncclioJtis iiifi(hi,s, sp. nov. ; teeth, three times nat. size, from different 



parts of jaw (3 ft — oc), with (3 c/) shagreen enlarged eight times. 

 The type specimen. — Zone of Holaster sahijlohosus ; Snodland, Kent. 

 Egerton Collection (B. M. no. P. 1295). 219. 



4. Ditto ; antero-lateral tooth, outer view, twice nat. size. — Zone of Holaster 



siihglohosus ; Wouldham, Kent. G. E. Dibley Collection (B. M. 

 no. P. 10228). 219. 



5. Si/iicchodus illiiKja-ortlii (Dixon); tooth, inner and (5ft) coronal views, 



one and a half times nat. size. — Clialk ; Sussex. Egerton Collection 

 (B. M. no. P. 2148). 220. 



6. Ditto ; tooth, outer and (0 ft) coronal view, one and a half times nat. size. 



— Zone of Holaster suhglobosns ; Southeram, near Lewes. B. M. 

 no. P. 5879. 220. 



7. Ditto ; five associated teeth, nat. size.— English Chalk. B. M. no. 45311. 220. 



8. Synechodus recurvus (Trautschold) ; tooth, outer and (8 ft) lateral views, 



nat. size. — Zone of Beleimdtclla 'inncronata ; NorAvich. Bayfield 

 Collection (B. M. no. 48953). 221. 



