Fossil sponge?

[Bob Saunders]

Phylum Porifera (sponge)   M. Odovician

Bobcaygeon Formation    Kirkfield, Ontario. Cananda  4.5 cm long  

 

This is another from an old collection as found. Wrapped with a number tag to match a  hand writ-in entry. The sponges I have shows some formation. I will put it in the ultrasonic cleaner. What do you think, do the come smooth? 

Bob

[Bob Saunders]

http://www.thefossilforum.com/index.php?/collections-database/sponges/

[Rockwood]

It may be an acquired image, had by someone who has done thin section studies on specimens which are similar enough,  but I don't see sponge here. 

[Bob Saunders]

Thanks, I purchased this and it is rounded, not a slice or cut. An online search of images does show several smooth surface sponges somewhat similar, including in the above link. She said that his journal dates from at least the 1950-1960's . I do not know if all were self collected. I will see what the cleaning reveals. 

[Bob Saunders]

after some cleaning. #4-142719 shows formation on the surface at the lower right. push other places. 

[Bob Saunders]

with scope,  so to speak the piece is kind of a waxy  light tan color. 

[Rockwood]