Pigs. 



Figs. 1 á 4. — Pleuroraya iiiconstans nov. sp 10 



» 5, 6 y 7.— Vermetus (Bartioella) CorDejoi dov. sp 12 



» 8. — Pulcbellia? Mexicana nov. sp 35 



» 9. — Phylloceras cf. Yelledoe (Micbelin) ,.,.,,,, ,,.,,. 13 



