EXPLANATION OF PLATE. 



FIG. 1. Pholidophorus sp. ; right lateral and partly ventral aspect of 

 head and abdominal region of fish, nat. size. Oxford 

 Clay; Chickerell, near Weymouth. ag. , angular bone ; 

 br. , branchiostegal rays ; d. , dentary bone ; op., oper- 

 culum ; pet., portion of pectoral fin ; s. op., suboperculum. 



la. Portion of right dentary of same specimen, three-halves 

 nat. size. 



16. Imperfect anterior rays of dorsal fin of same specimen, 

 nat. size. 



lc., Irf. Scales of same specimen, three times nat. size. 



FlG. 2. Pholidophorus sp. ; terminal caudal vertebrae and remains of 

 caudal fin, nat. size. Oxford Clay; Christian Malford, 

 Wiltshire. [British Museum, no. P. 4265.] 



