2 

 ALCYONAEIA. 



HeLIOLITES INTEB.STINCTUS, Linn. 



Hespeler, T. C. "Weston, 1867: a single specimen, identified by E. 

 Billings. 



ZOAXTHAEIA TABULATA. 



Halysites compactus, Eominger. 



Gait, Eev. Andrew Bell, 1846-50: Blora, E. Bell, 1861, and Mr. 

 David Boyle, 1880 : Hespeler, T. C. Weston, 1867. 



Two average Canadian specimens of this species have been forwarded 

 to Dr. Eominger, who has kindlj- examined them and confirms the 

 coiTectness of their identification. 



ZOANTHAEIA EUGOSA. 



CrSTOSTTLtTS INFUNDIBUL0S, Wllltficld. 



Syringopora infvn(libula,'\\hit&e\d. Ann. Eep. Geo!. Surv.AViscons . 1877, p- 79. 

 Oystostylus ■io/midifetiZws, AVhitfield, Gaol, of Wiscons . 1882, Vol. iv, p. 274, pi. 

 14, fig. 7. 



JSlew Hope, B. Billings, 1857 : Elora, Mr. David Boyle : Durham, 

 Ml-. Joseph Townsend, 1883. 



Pycnostylus. (Gen. Ifov.) 



Internal stmcture very similar to that of Amplexus, the radiating 

 septa being rudimentary and extending but a short distance from the 

 inner sui-face of the outer wall, but the tabulae, though well developed 

 and complete, are entirely horizontal and neither bend upwards at the 

 periphery nor "embrace each other with their reflexed margins."* 



Corallum compound, consisting apparently of an aggregation of 

 numerous, slender, cylindrical or subcylindrical polyp .stems, wjiich 

 divide by calicular gemmation at distant intervals into sets of three 

 four or more, ascending, sub-parallel, contiguous, flexuous branches. 

 Structui-e of the calices previous to gemmation, and charactei-s of the 

 basal portion of the corallum unknown. 



The above named genus is constituted for the reception of two spe- 



* Min. Conch., vol. 1, p. 165, 



