PliATE 
Fig. 1. 
Figs. 2, 3. 
Fig. 4. 
Fig. 5. 
Fig. 6. 
Fig. 7. 
Pago. 
FristiaoDius yracilis, gon. et sp. nov. ; lateral a.spect of fi.sli wanting the head... 33 
rristisomns talus, gen. et .S}!. nov. ; lateral a.spect of two lishos, the fir.st wanting 
the tail, the .second the head, . . ... ... ... ... ... ... 35 
Jfitto ; portion of ti.sh, lattwal aspect, showing pectoral tin. 
Pristisonms crassus, gen. et. sp. nov.; imperfect fish, lateral aspect ... ... 3G 
Ditto ; head and anterior portion of abdominal region, lateral a.spect. 
Ditto ; caudal region, lateral aspect. 
