[DAWSON] FOSSIL SPONGES AND OTHER ORGANIC REMAINS 



109 



Family DicTYOspoNOiDyK, Ilall. 



Genus CYATIIOPIIYCUS, Wakolt. 



8. — Cyathopiivcus Quebecense, Dawson. 



(Figs. 18 and 19.) 



Fig. l8.—Cyathophycus Quebecenne. Fio. 19.— Cyathophyetis Quebecense. 



Restored. Base enlarged. 



Form elongated conical, composed apparently of numerouB long, 

 vertical spicules, crossed l>y horizontal or annular hars, and with a few 

 cruciform spicules in the meshes. The vertical and transvei-se spicules 

 may be ci'uciform spicule^j arranged vertically. The form terminates 

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

 spicules. This species closely resembles Ci/nthophynis reticulafum of 

 Walcott from the Utica shale, but ditlers in detail, especially in (he sim- 

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

 bai"s. The largest specimens are 8 cm. long l»y 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 Ifolnsrus. 



I changed the generic name to Ci/dtliospoiK/id in my paper of 188!), 

 as the termination 8eeme<l incon^ict; but this name seems to have been 

 preoccupied by Prof. Hall. I therefore leave it in the original form 

 until amended by the author. 



The si)onge8 of the genus <'i/othophyrus are not abundant in t!ie 



Sec. IV., 1896. 7. 



