Crankset removal, Shimano FC-M361 I'm trying to save an old Trek and need to remove the bottom bracket. 

The crankset says FC-M361 but when I google that it says that's a square taper bottom bracket. This surely doesn't looks like a square taper. How do I remove it and what's it called?





Update

I just realised that my crank removal tool cant do this type of square taper. I have been using this for 10+ years on many bikes and it has always worked.



Update 2

It is an octalink. My neighbour had a tool and removal was straight away.

Thanks!
I think what is confusing you is that the square hole cannot be seen in the crank with the retaining bolt removed. It seems this model of crank has a circular flange at the outboard end of the square hole for the bolt head to bear on. 

Regardless of what the axle-crank interface is, the cranks are removed with a  crank puller tool that threads into the retaining bolt hole in the axle and the larger threads in the crank, and pulls the two apart. 

DO NOT attempt to get the cranks off any other way, you will damage the square taper interface in the alloy crank arm. (Someone asked a question here once who had levered his cranks off with a crowbar, and totally trashed them.) 

You also need a special tool to remove the cartridge bottom bracket. There a ton of help available on the web. Personally I think Park Tool's pages and youtube videos are the most detailed and comprehensive.

Removing 3-piece cranks

Removing cartridge BB