Thanks Tarquin. I have a lot to learn and your explanation is very useful. I have attached a photo of a much bigger specimen collected from the same site which exhibits some branching. Do you cut and polish to see detail or use acetate peels?
Hi - I'm pretty sure that one is Siphonodendron, with clear lateral branches. Very nice specimen!
As you can see from the thread that Curt mentioned, I use polished sections. I have the materials for acetate peels but never bother! For photography, I nowadays just submerge the surface in water (by 1mm or so), and photograph with a DSLR camera (manual focus) on a copy stand with good lighting.