EXPLANATION OF PLATE XLIV. 



Figs. 1-4. Portheus ihaumns type, natural size. 

 Fig. 1. Part of vertebral col umu. 



2. Terminal vertebra^ with hasnial and neural spines supporting caudal fin ; a, first fan-shaped 



ha?uial spine. • 



3. First fan-shaped h;tmal spine, viewed from above ; 3 a, the same, proximal articular face. 



4. llargiual rays of caudal fin. 



5. Fragmeutarypectoral spiue of the type-specimen of Fcu'theua molossiis, Cope. 



Figs. 6-9. Ventral spines of a Saiiroclont, found together, species nukuown : C, the first; 7, the second; 

 8, third; a, oiiposite side of same; 9, basis of one more distal. 

 10-11. Scapula of Fortheus moJossus, type-specimen ; inverted. 

 Fig. 12. Pectoral spine of Fekcoptenis gladius ; a, from anterior edge. 



13. Pectoral spine of Fch-copteriis 2)eriiiciosus ; a, from posterior edge. 



14. Part of vertebral column of type of IchlhyocUctes anaidcs, Cope, found iu position, natural size. 



15. Vertebra} of the same siiecimen. 



