MaRVLAXD GkOI.OGICAL Sl'RVEY 219 



Family AULOPORIDAE 



Genus AULOPORA Goldfuss 

 AULOPORA SCHOHARI.E Hall 



Plate XXVI, Figs. 2, 3 



Aulopora schohariw Hall, 1874, 26th Rept. N. Y. State Mus., p. 110. 

 Aulopora schohariw Hall, 1879. 32d Rept. N. Y. State Mus., p. 142. 

 Aulopora schohariw Hall, 1883, Rept. N. Y. State Geol. for 1882, pi. ii, figs. 1-G. 

 Aulopora schohariw Hall, 1887, Pal. N. Y., vol. vi, p. 3, pi. ii, figs. 1-6. 



Description. — " Coralluin consisting of elongate, tubular, thick-walled 

 cells, gradually enlarging to the aperture; increasing, sometimes by one 

 individual budding from the basal part of the calyx and continuing in 

 direct line; at other times there is a doidjle latero-basal gemmation, the 

 tubes growing at an angle of about 45° to the parent. Exterior truns- 

 versely wrinkled. All the tubes after budding a.ssume an erect position 

 and cease growth." Hall, 1887. 



Diameter at snuiller end 0.8 mm., at aperture 1.5 mm. ; length from 5 to 

 7 mm. 



Occurrence. — Helderbekg Formation, Keyser Member. Hyndman. 

 Pennsylvania. Becr^vft Member. Ernstville. 



Collection. — ^Maryland Geological Survey. 



Aulopora schucherti n. sp. 

 Plate XXVI, Figs. 4, 5 



Description. — Corallum consisting of elongate tubular cells, branching 

 repeatedly, the branches uniting by their walls to form an intricate net- 

 work from which numerous short branches ascend. Exterior annnlated 

 by fine striations. The branches terminate in circular calyces of variable 

 depth, their depth being in some specimens less and in others greater than 

 width. Base of calyx occasionally divided transversely by a low ridge. 



Diameter of branches, 1.5 mm. 



This species closely resembles A. tuhula with which it may be conspecific. 

 It differs in branching more intricately, while the branches are more inti- 

 mately united by frequent fusion of their walls. 



Occnrrcnce. — ^HELnKiiBKUG Formation', Keyser Member. Keyser 

 West Virginia ; Cookerly Cladopora rectilineata zone. Cash Valley, Devil's 



