[DAWSON] FOSSIL SPONGKS AND OTHER ORGANIC REMAINS 109 



Family DicTYOSPONGiDiE, ITall. 



Genus CYATHOPHYCUS, Walcott. 



8. — Cyathophycus Quebecense, Dawson. 



(Figs. 18 and 19.) 



Fig. IS.—Cyathojjhycus Quebecense. Fig. \9.~Cyathophycus Quebecense. 



Restored. Base enlarged. 



Form elongated conical, composed apparently of numerous long, 

 vertical spicules, crossed by horizontal or annular Lars, and with a few 

 cruciform spicules in the meshes. The vertical and transverse spicules 

 may be cruciform spicules arranged vertically. The form terminates 

 downward in a blunt point, with indications of a few short anchorino-- 

 spicules. This species closely resembles Cyathophycus reticulatuvi of 

 Walcott from the Utica shale, but differs in detail, especially in the sim- 

 plicity of the vertical rods and development of the transverse or circular 

 bars. The largest specimens are 8 cm. long by 3 wide at top. There are 

 signs of minute lateral defensive spicules. The general form and struc- 

 ture resemble those of the modern sponges of the genus Holasrus. 



I changed the generic name to Cyathospongia in my paper of 1889, 

 as the termination seemed incorrect ; but this name seems to have been 

 pre-occupied by Prof. Hall. I therefore leave it in the original form 

 until amended by the author. 



The si)onges of the genus Ci/athophycus are not abundant in the 

 Sec. IV., 1896. 7. 



