166 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



and sometimes by a thickening of the innermost dissepiments and the 

 septa in a cycle surrounding the tabulae. 



Type species. — P. Rennahi, d'Orbigny. 



Range. — Devonian and Carboniferous. 



Phillipsastrea Verneuili, Milne-Edwards and Haime. 



Plate XIV., fig. 4. 



Phillipsastrea Verneuili, Milne-Edwards and Haime. 1851. Polyp. Foss. des Terr. 

 Palseoz., p. 447, pi. 10, fig. 5. 

 it ti Billings. 1859. Canadian Journal, new series, vol. IV,, p. 127 



fig. 24. 

 Phillip&astrea aflinis, Billings. 1874. Plseoz. Foss., vol. II., pt. I., p. 11. 

 Phillipsastrcea Verneuili, Nicholson. 1875. Palaeon. of Ont., p. 78. 



,i .1 Rominger. 1876. Geol. Sur. Mich., Foss. Corals, p. 127 pi. 



XXXVII. , fig. 2. 

 „ i, Whiteaves. 1879. Rep. of Progress for 1877-78, Geol. Survey of 



Canada, p. 5c. 

 ,i ii Lambe. 1899. Ottawa Naturalist, vol. XII., p. 250. 



11 Corallum forming large discoidal masses over 30 cent, broad and 8 

 cent, thick or high, upper surface flat, lower surface irregular, strongly 

 marked by concentric foldings or wrinkles of growth and covered by an 

 epitheca. Septa numbering from about thirty to forty-six. Coral lites 

 varying in diameter from 10 to 16 mm. Central pit of the calices from 

 3 to 5 mm. in diameter. In no particular does this species differ from 

 P. Billingsi, except in the smaller size of its corallites and in a diminution 

 in the number of the septa. In transverse sections and in weathered 

 specimens it is observed that a single row of pore-openings occurs be- 

 tween each pair of septa, the pores piercing the dissepiments where they 

 rest on each other, the distance apart of the pores in a single row thus 

 depending on the size of the dissepiments. This pore structure, which 

 appears not to have been noticed previously in species of this genus, and 

 which is well shown in some specimens of P. Billingsi, in the collection, 

 is apparently somewhat analagous to that which is seen in some species 

 of the genus Arachnophyllum. 



" Localities. — Corniferous formation of Ontario ; Indian- Cove, Gaspe, 

 in the Gaspe limestone, No. 8* (Oriskany formation), collected by R. 

 Bell in 1862 ; also three loose specimens from the Devonian area south of 

 Hudson Bay, collected by R. Bell in 1877, at Long Portage, Missinaibi 

 River to Moose Factory. Of the Long Portage specimens one has coral- 

 lites of average size, but the other two have corallites and calicinal pits 

 that are considerably larger than those of specimens usually assigned to 



* See reference on p. 124 to the age of the Gaspe limestone, No. 8. 



