PLATE XLV 



PAGE 



Pigs. 1, 2. ZAPHRENTIS MARYLANDICUS n. sp 539 



1. Cast of calyx of type specimen as seen from below. 



2. Side view of preceding showing its relation to outline of corallite. 



Jennings formation, Chemung member, National Road, Polish 

 Mountain, 2714. 1 



Figs. 3-6. ZAPHRENTIS CHEMUNGENSIS n. sp 540 



3. Side view of cast of interior of calyx, showing its relation to shape 



of corallum. 



4. Lower surface of preceding. 



5. View of type specimen, similar to fig. 3. 



6. Lower surface of same individual. 



Jennings formation, Chemung member, Polish Mountain, 2714. 



Figs. 7, 8. HELIOPHYLLUM SCRUTARIUM n. sp 540 



7. Branching corallum showing calyxes. 



8. Specimen similar to preceding. 



Jennings formation, Chemung member ?, Sideling Hill Creek, 

 Washington County. 



Fig. 9. FAVOSITES sp 541 



A small corallum showing size of the cells. Jennings formation, Che- 

 mung member ?, Sideling Hill Creek, Washington County. 



Figs. 10, 11. AULOPORA REPENS Knorr and Walch 542 



10. Corallum attached to shell of Rhipidomella vanuxemi. 



11. Corallum similarly attached, showing some difference in propor- 



tion of corallites. 



Jennings formation, base of Parkhead member, hill-top south 

 of Potomac River, 2V 2 miles southeast of Cumberland. 



1 The figures following localities indicate the altitude in feet above the base 

 of the Jennings formation at which the specimens were found. 



128 



