﻿140 Cayiadian Record of Science. 



Clathrodictyon cellulosum, Nicholson and Murie. 



Clathrodictyon cellulosum, W\Qh.o\?>on andMurie. 1878. Joiirn. 

 Linn. Soc, Zool., vol. XIV., p. 

 221, pi. 2, tigs. 9 and 10. Nichol- 

 son, 1887. Ann. and Mag. Nat. 

 Hist., ser. 5, vol. XIX., p. 11, pi. 2, 

 figs. 7 and 8. 

 " Not uncommon in the Corniferous Limestone (Devon- 

 ian) of Port Colborne and other localities in Western 

 Canada." Nicholson. 



Clathrodictyon laxum, Nicholson. 



Clathrodictyon laxum, ^iohol^ow. 1887. Ann. and Mag. Nat. 



Hist., ser. 5, vol. XIX., p. 12, pi. 3, 



figs: 4 and 5. 

 " Corniferous limestone. Port Colborne, Ontario," 

 Nicholson. A fine specimen in the Museum of the 

 Oeological Survey at Ottawa, which was identified with 

 this species by Professor Nicholson, was collected from 

 the Corniferous limestone at Pelee Island, Ont., by the 

 Rev. W. Minter Seaborn in 1884. 



Clathrodictyon retiforme, Nicholson and Murie. (Sp.) 



Stylodicty on retiforme, 'Nicholson and Murie. 1878. Journ. 

 Linn. Soc, Zool., vol. XIV., p. 222, 

 pi. 2, fig. 14, and pi. 3, figs. 1-3. 

 Clathrodictyon retiforme, Nicholson. 1887. Ann. and Mag. 

 Nat. Hist., ser. 5, vol. XIX., p. 13, 

 pi. 3, figs. ^-S. 

 " Rare in the Hamilton formation (Devonian) at 

 Arkona, Ontario," where it was discovered by Dr. G. J. 

 Hinde. Nicholson. 



