PLATE LXI. 



PAGE 



Fig. 1. Fragment of spatangoid plate 232 



Evergreen, "\'a. X 5/3 



Fig. 2. ECHINOID SPINE 232 



Potomac Creek. 



Figs. 3, 3a. Flabellum sp 222 



3. Upright view of coralhim, height 12 mm. 1 mile southeast of 



Piscataway. 

 3a. Calicnlar vie"w, greater diameter of calice, 15.5 mm. 



Figs. 4, 4a, 4b. Turbinolia acuticostata Yaughan 223 



4. Upright view of coralluin, height 6.5 ram. Popes Creek. 

 4a. Calicular view, diameter of calice, 3 mm. 



4b. Margins of the cost» of another specimen enlarged. 



Figs. 5 to 8. Trochocyathus clarkeanus Yaughan 225 



5. Upright view of a specimen, height 12.5 mm. 



5a. Calicular view of the same, greater diameter of calice, 7.75 mm. 



6. Upright view, height 10.5 mm. 



7. Upright view of another specimen, height 10 mm. 



8. Upright view of a fourth specimen, height 9.5 mm. 



Figs. 9, 9a, 9b. Paracyathus mary'LANdicits n. sj) 226 



9. Upright view of corallum, height 5 mm., 1 mile northeast of 



Piscataway. 

 9a. Costse enlarged. 

 9b. Calicular vie^v, greater diameter of calice, 5.75 mm. 



Figs. 10, 11. Balanophyllia desmophyllum M.-E. and H 227 



10. Upright view, height 23 mm., 1 mile southeast of Mason Springs. 



11. Uprig'ht vie^v of another sj)ecimen, heig'ht 26 mm. Same locality. 



Figs. 12 to 14. EupsAMMiA elaborata (Conrad) 229 



12. Upright view of a specimen, height 17.5 mm. 



13. 13a. Conrad's type (from Alabama), leng-fh of corallum, 13 mm.; 



greater diameter of calice, 12 mm. 



14. 14a. An unusually slender specimen; height of corallum, 15.5 



mm.; greater diameter of calice, 9.5 mm. Potomac Creek. 



Figs. 15, 15a, 15b. EuPSAMMlA CONE.ADI Yaughan 231 



Conrad's type of Turbinolia pileolus (not Turhinolio pileohis Eicli- 

 wald). Height of corallum, 11 mm.; greater diameter of calice, 

 13 mm. Acad. Nat. Sci. Phila. 



