PLATE X. 
Fig. Page 
1. Ctmothrissa radians (Agassiz); left lateral aspect.— 
Lower Chalk; Burham. d. Dentar 3 \ plv. Pelvic 
fin. [47911.] 123 
2. Ditto ; head and anterior abdominal region, light lateral 
aspect.—Lower Chalk; Kent. ag. Articulo-angular. 
mx. Maxilla, s.mx. Supramaxilla. Other letters as 
above. [P. 4843.] 123 
3. Ditto; head, right lateral aspect. —Ibid. i.op. Inter¬ 
operculum. op. Operculum. p.op. Preoperculum. 
pmx. Premaxilla, s.op. Suboperculum, Other letters 
as above. [P. 5699.] 124 
4. Ditto; restored outlines of maxillar\^ and mandibular 122 
bones. Letters as above. 
5. Ctenothrism microcepliala (Agassiz-); trunk, right lateral 
aspect.—Lower Chalk ; Burham. [P. 1946 a.] 126 
6. Ditto ; imperfect fish, inferior aspect.—Ibid. 
[41689.] 126 
