92 PISCES CLASS I 



and reaching the hinder end of the anal fin ; caudal fin convex behind, very 

 large. Several species in the Upper Jurassic (Lithographic Stone) of Bavaria, 

 Nusplingen, and Cerin, and in the English Purbeck Beds. M. mawsoni, Sm. 

 Woodw. From Cretaceous of Bahia, Brazil. 



Liodesmiis, Wag. (Lophiurus, Vetter). Lithographic Stone ; Bavaria. 



Opsigonus, Kramberger ; Amiopsis, Kner. Lower Jura ; South Dakota. 

 Lower Cretaceous ; Dalmatia and Istria. 



Amia, Linn. (Cydurus, Notaeus, Ag.), (Fig. 167). Fulcra absent. Dorsal 

 fin arising in front of the pelvic pair and extending to the caudal fin. Living 

 in North America ; fossil in the Upper Eocene and Lower Miocene freshwater 

 formations of Europe and North America. A. (Notaeus) longicauda, Ag. 

 (Montmartre), A. (Cydurus) valenciennesi, Ag. (Armissan), A. kehreri, Andreae 

 (Messel, near Darmstadt), A. anglica, Newton (Isle of Wight). 



Pappidifhys, Cope. Eocene ; North America. 



Family 3. Oligople-uridae. Smith Woodward. 



Vertebrae well ossified, with no distind pleurocetitra and hypocentra. Mouth 

 wide, with teeth small or of moderate size. Fidcra present. Scales very thin and 

 cydoid. Upper Jurassic to Upper Cretaceous. 



Oligopleurus, Thiolliere (Fig. 168). Teeth very small, and mandible 

 prominent. Vertebral centra not pitted. Dorsal fin short-based, opposed to 



Uliijojyleurus esodnus, Thioll. Upper Jurassic (Lithographic Stone) ; Cerin, Ain, France. 

 1/4 iiat. size (after Thiolliere). 



anal fin. Caudal fin slightly forked. Scales rather large. 0. esocinus, Thioll., 

 from Lithographic Stone, Cerin (Ain, France). Other species in English 

 Wealden and Purbeck Beds. 



Oenoscopus, Costa (Affakeopsis, Thioll. ; Macrorhipis, Wagn.). Almost as 

 above, but vertebral centra with two lateral pits, and greater portion of dorsal 

 in advance of anal fin. 0. petraroiae, Costa, from Lower Cretaceous, Pietraroja, 

 Prov. Benevento, Italy. Other species in French and German Lithographic 

 Stone. 



Spathiurus, Davis. AVith much extended dorsal fin. LTpper Cretaceous ; 

 Mount Lebanon. 



Sub-Class 6. TELEOSTEI.^ Bony fishes. 



Skill with thin, elastic, cycloid or ctenoid scales, rarely with bony plates. Vertebral 

 column ossified ; tail internally and externally homocercal. Intermuscidar bones more 



^ Bassojii, Fr., Descrizione dei pesci fossili di Lesina accompaguata da appunti su alcune altre 

 ittiofaime cretacee (Denksclir. k. Akad. Wiss. Wien, math.-naturw. CI. vol. XLV.), 1882. — Kner, R., 

 Ueber einige fossile Fische aus Kreide und Tertiarschichten von Conien iiiul Podsuded (Sitzungsb. 



