Canadian Fossil Bryozoa. 225 



are the horizon and locality respectively to which Prof. 

 Ulrich has ascribed this species. 



14. Stictoporella proavia (Coscinium, Eichwald, as of 

 Billings) from the " Trenton " of " Canada." 



IX. Genus Arthroclema, Billings. 



15. Arthroclema pulchellum, Billings. Trenton limestone, 

 Hull, Que. 



16. Arthroclema Billingsi, Ulrich. This is recorded from 

 the Trenton limestone of Ottawa, Canada. 



X. Genus Nematopora, Ulrich. 



IT. Nematopora ovalis, Ulrich. Trenton limestone, Mont- 

 real, Canada. 



XI. Genus Phylloporina, Ulrich. 



18. Phylloporina Trent onensis, Nicholson. No Canadian 

 locality is indicated in this volume, but the writer has seen 

 several specimens of P. Trentonensis, Nich.^ from the Tren- 

 ton limestone of Montreal in the Peter Eedpath Museum of 

 McGill College, and these were named by Prof. E. O. 

 Ulrich. 



C. — Trepostomata, Ulrich. 



XII. Genus Monticulipora, d'Orbigny. 



19. Monticulipora Wetherbyi, Ulrich. This species is re- 

 corded by Prof. Ulrich as coming from the limestone beds 

 St. Andrews, Manitoba. 



XIII. Genus Homotrypa, Ulrich. 



20. Homotrypa similis, Foord. " The types are from the 

 Trenton at Ottawa, Canada." The species was described 

 by Mr. A. H. Foord, F. G. S., on p. 10, " Contr. to Micro- 

 Pal, of the Cam bro Silurian Eocks of Canada," Ottawa, 1883. 



XI Y. Genus Prasopora, Nicholson and Etheridge, Jr. 



21. Prasopora simulatrix, Ulrich ; var. orientalis, Ulrich, 

 Canada. This new var. of P. simulatrix, Ulrich, has been 

 created to receive such Canadian and New York forms as 

 showed a number of distinctive microscopic characters and 



