308 Systematic Paleontology 



Corallites nearly 1 cm. in diameter. 



This species closely approaches CystipJiyllum aggregatum Billings. 

 The corallites of the latter species are much larger, being at times 1 inch 

 in diameter and bear pronounced epithecal protrusions, a feature not 

 observed in the individuals described. 



Occurrence. — Helderberg Formation. IS^ear Cumberland ; crest of 

 Warrior Mountain 1 mile north of Signal Station. 



CollecUoris. — Maryland Geological Survey, U. S. National Museum. 



Cystiphyllum sp. 



Description. — Several fragments of a species having a simple conical 

 corallum and clearly referable to this genus are found in the Helderberg 

 of Maryland. They are, however, too poor to permit of specific determi- 

 nation. 



Occurrence. — Helderberg Formation, Keyser Member. Pinto. 



Collection. — Maryland Geological Survey. 



Suborder TABU LATA 

 Family FAVOSITIDAE 



Genus FAVOSITES Lamarck 



Favosites helderberg I. t: Hall 

 Plate XXII, Fig. 1 



Favosites helderberg ia- Hall, 1874, 26th Rept. N. Y. State Mus., p. 111. 

 Favosites helderbergia' Hall, 1879, 32d Rept. N. Y. State Mus., p. 145. 

 Favosites helderbergiw Hall, 1883, Rept. State Geol. of N. Y. for 1882, pi. iv, 



figs. 1, 2; pi. v, figs. 1-3; pi. vl, figs. 1-8. 

 Favosites helderbergiw Hall, 1887, Pal. N. Y., vol. vi, p. 8, pi. iv, figs. 1, 2; 



pi. v, figs. 1-3; pi. vi, figs. 1-8. 

 Favosites helderbergiw Girty, 1895, 48th Rept. N. Y. State Mus. for 1894, vol. 



ii, p. 302. 

 Favosites helderbergiw Weller, 1903, Pal. N. J., vol. iii, p. 270. 

 Favosites helderbergiw Grabau and Shimer, 1909, N. Amer. Index Foss., vol. 



i, p. 85, fig. 138. 



Description. — " Corallum consisting of large, lenticular, depressed con- 

 vex or hemispherical masses ; base covered by a strongly wrinkled epitheca. 



