[X-Unix] FreeBSD disk mount

[R Waechter]

Hello,

I've got a compact flash card that is formatted using the FreeBSD
native filesystem.  I want to be able to mount it under OS X.3.

I've tried various things based on

% sudo mkdir /mnt
% sudo mount -t <?> /devs/disk1s1 /mnt

for various types (ufs, etc), but to no avail ("Invalid super block").
The accessing light flashes on the usb reader, so I think I'm hitting
the right device.

Obscure, I know, but has anyone done this, and what was the command
you used?

TIA,
rip