A. Smith Woodu-ard — Greensand Ganoid Fishes. 213 



keel, making the transverse section triangular at the end of the 

 vomerine region ; surface nearly smooth. 



This species has already been incidentally mentioned in discussing 



Outlines of Eostra of Protosphyrana in lateral aspect and transverse section, 



one-half natural size. 



Fig. 1. Frotosphyrcena tenuirostris, sp. nov. — Cambridge Greensand. [Wood- 



wardian Museum, Cambridge.] 

 Tig. 2. Frotosphyrwna compressirostris, sp. nov.^ — Kentish Chalk. [Brit. Mus. 



No. P. 6631.] 

 Fig. 3. Frotosphi/rcena ferox, Leidy.— Kentish Chalk. [Brit. Mus. No. P. 5630.] 

 Fig. 4. Frotosphyrmna Eeepingi, sp. nov. — Cambridge Greensand. [Woodwardian 

 Museum, Cambridge.] 



1 This species may be characterized thus: Eostrum much elongated, and 



