;UB-CLASS V 



GANOIDEI 



91 



Pacfiycormus, but with larger teeth, small pelvic fins, and a much extended 

 anal fin. Large teeth rounded in section, of complex structure. H. insignis, 

 Wagn., from Lithographie Stone of Bavaria. H, leedsi, Sm. 

 Woodw., from Oxford Clay, Peterborough. 



Protosph?jraena, Leidy ^ (Erisichthe, Felecopterus, Cope), 

 (Fig. 164). Known only by fragments of head and fins 

 much resembling those of Hypsocormus, but teeth laterally 

 compressed, and snout more produced. F. ferox, Leidy, 

 and other species, in the Upper Cretaceous of Europe and 

 North America. The teeth were wrongly ascribed to Sauro- 

 cephahis, Harlan, by Agassi z. 



Family 2. Amiidae. Günther. 



Fio. 164. 



(Megaluridae, Zittel: HalecomorpJii, Cope.) Tooth of Proto- 



sphyraenaferoXylieidy. 



Vertebral column well ossified, and flexed upwards hehind into HP^^/ ^ii*}^ '. ^^^^' 

 the Upper pari of the rounded caudal fin. Pleurocentra and hypo- 

 centra forming complete alternating discs in pari of the caudal region, the alternate 

 discs bearing the neural and haemal arches. Teeth powerful. Branchiostegal rays 

 broad and few ; gular plate large. Fulcra present or absent. Scales very thin and 

 cycloid. Upper Jurassic to Recent. 



Megalurus, Ag. (Figs. 165, 166). Vertebral column much produced into 



Megalunis elegantissimus, Wagn. Upper Jurassic ; Solenhofen, 

 Bavaria. 2/^ nat. size. 



.•^"(^^m^^^ 



Fig. 16(5. 



Megalurus polyspondylus, Münst. Upper Jurassic ; Kelheiin. 

 A, Portion of vertebral column, nat. size*. B, Scales, enlarged. 



Fig. 1(57. 

 Amin calva, Linn. Head, from be- 

 neath. Recent ; Soutli Carolina, brs, 

 Branchiostegal rays ; h, Ceratohyal ; 

 jug, Gular plate ; md, Mandible. 



the Upper caudal lobe; caudal hemi-vertebrae rather elongated. Fulcra 

 present. Dorsal fin considerably extended, arising opposite the pelvic fins, 



1 Felix, J., Zeitschr. deutsch, geol. Ges. vol. XLIl. 1890, p. 278. — Woodicard, A. Sm., Anu. 

 Mag. Xat. Hist. ser. 6, vol. XIII. 1894, p. 510. 



