PLATE XLV. 



Fig. Page. 



1. Ccstracloii caiuiliculatn.s, Egertoii ; lower view of imperfect jaws, iiat. size, 



with (1 (t) anterior tooth, outer view, three times nat. size, and (1 h) 

 upper principal lateral teeth, coronal view, one enlarged three times 

 and (1 e) part of its ornament enlarged five times; also (If/) three 

 dermal tubercles, one being in outer view, one from the side, and 

 one from ])elow, enlarged twelve times. — Turonian zone ; Mailing, 

 near Lewes. Willett Collection no. 182, Brighton Museum, md., 

 mandible; ptq., pterygo-quadrate (upper jaw); .s., shagreen: i, ii, 

 III, three series of principal lateral teeth of upper jaw. 215. 



2. Ditto; anterior tooth, inner view (2c/), hinder principal lateral teeth 



and another lateral tooth (.c), coronal view (2 h), the same principal 

 lateral teeth, seen from attached face, showing oblique perforation 

 (2 c, c), and one anterior principal lateral tooth, coronal view (2 d), 

 all three times nat. size. — Chalk ; Guildford. Capron Collection 

 (B. M. no. 497.35). • 215. 



3. Ditto ; portion of vertebral column, with anterior dorsal fin-spine. — 



Chalk; Sussex. B. M. no. P. 4021. 215. 



4. Ditto (?) ; lateral tooth, coronal view, nat. size, with (4 (() part of its 



ornament enlarged five times. — Turonian zone ; Lewes. Mantell 

 Collection (B. M. no. 4166). 216. 



5. Ditto (?) ; lateral tooth, coronal view, nat. size. — Zone of Terchrattduut 



gracilis ; Warlingham, Surrey. G. E. Dibley Collection (B. M. 

 no. P. 6489). 216. 



6. Sijncfliodiis duhrisiensis (Mackie) ; right side view of jaws, nat. size, 



with (6 a) an antero-lateral tooth, outer view, enlarged three times. 

 The type specimen. — Zone of HoJasler sulxjiuhusiis ; Dover, vid., 

 mandible; p., pterygo-trabecular process; I'tq., pterygo-quadrate. 

 B. M. no. 36908. 217. 



7. Ditto ; jaws and hyoid arch, seen from the left side and (7 a) from 



below, nat. size, with three teeth (7 ?>, 7 c, 7 d), enlarged three times. 

 —Chalk; Kent. Toulmin Smith Collection (B. M. no. 41675). 

 chy., ceratohyal ; Jim., hyomandibular ; ot., otic process, with facette 

 for articulation with postoi'bital process of skull ; x., tuberosity on 

 ceratohyal; other letters as in fig. 6. 217. 



