PLATE XV. 
Fig. Page 
1. Mesturus verrucosus , Wagner ; fish, wanting ventral 
margin, left lateral aspect, one-half nat. size.—Lower 
Kimmeridgian; Solenhofen. ag. Angular, ch. Cera- 
tohyal. cl. Clavicle, d. Dentary. hy. Hypohyal (?). 
ic. Intercalary series of scales, n. Neural spines, op. 
Operculum, p.b. Pectoral basals. p.op. Preoperculum. 
scl. Sclerotic, spl. Splenial. vo. Yomer. x. Cheek- 
plate. [37023.] 219 
1 a. Ditto; calcified gill-filaments of the same specimen. 219 
1 b. Ditto ; sutures between flank-scales of the same specimen. 220 
