52 



HYDROMEDUS^. 



HYDROIDA. 



Clathrodictyon ostiolatum, Nicholson. 



Stromatopora ostiolata, Nicholson 1873. Ann. Nat. Hist. , ser. i, 



vol. XII., p. 90, pi. 5., figs. 

 1 and la. 



1874. Rep. Pal. Prov. Ont., 



pi. 1, figs. 1 and la. 



1875. Rep. Pal. Prov. Ont., 



p. 63. 



" " 1878. Journ. Linn. Soc, vol. 



XIV., pi. 2, figs, land 2. 

 Olathrodictyon (Stromatopora) ostiolatum, Nicholsbn. .1886. Mon. Brit. Stromatop., 



pt. 1, p. 14. 



Clathrodictyon ostiolatum, Nicholson 1887. Ann. Nat. Hist., ser. 



5., vol. XIX., p. 11, pi. .3, 

 figs. 1-3. 



The specimen upon which this species was based was collected by Mr. 

 John Wilkie at Guelph, not later than the year 1873, but a few specimens 

 which have been identified with C. ostiolatum by Professor Nicholson and 

 which are now in the Museum of the Survey, were collected by Mr. David 

 Boyle at Elora in 1880, and by Mr. Joseph Townsend at Durham in 1884. 



Clathbodictyon fastigiatum, Nicholson. 



Clathrodictyon fastiyiatum, Nicholson. .1886. Mon. Brit. Stromatop. , pt. 11, p. 43, 



fig. 3. 

 ..1887. Ann. Nat. Hist., ser. 5, vol. XIX., p. 



8, pi. 2, figs. 3 and 4. 

 ..1888. Mon. Brit. Stromatop., pt. 2, p. 152, 

 pi. 19, figs. 1-5. 

 Glenelg Township, six miles from Durham, J. Townsend, 1884: five 

 specimens, which have been examined and named by Professor Nicholson. 



Labechia. Species undeterminable. 



Durham, J. Townsend, 1884 : a few specimens of the csenosteum of an 

 apparently undescribed species of this genus, which are too imperfect and 

 too badly preserved to admit of a sufficiently accurate description of their 

 distinctive characters. 



Steomatopoea Galtensis, Dawson. (Sp.) 



Ccenostroma OalteTise, Dawson 1875. Life's Dawn on the Earth, p. 160. 



" " " " 1879. Quart. Journ. Geol. Soc, Lond., vol. 



XXXV., p. 52. 

 Stromatopora Oaltensis, Nicholson . . 1891. Mon. Brit. Stromatop., p. 173. 



