Trochidae or not ?

[diocrisseashells1000]

Hello collectors,
                      I am uncertain if this are trochidae species. Could you kindly help me name this and if this are in the trochidae family?

<!-- m --><a class="postlink" href="http://www.flickr.com/photos/63645283@N06/sets/72157627606768178/&nbsp;">http://www.flickr.com/photos/63645283@N ... 178/&nbsp;</a><!-- m --> 5-8mm.
<!-- m --><a class="postlink" href="http://www.flickr.com/photos/63645283@N06/sets/72157627606762450/&nbsp;">http://www.flickr.com/photos/63645283@N ... 450/&nbsp;</a><!-- m --> 11mm.

Thanks,
Diocris.

[paul monfils]

The shells in the first set are all Herpetopoma species, which were formally placed in Trochidae, but are now I believe in Chilodontidae.  I believe the first 4 pictures are all H. instrictum, and the last two are H. exasperatum.

I believe the shell in the second set is Hybochelus cancellatus, which is also in Chilodontidae.

[diocrisseashells1000]

Thank you Paul for your great id, and on the new info.

Cheers,
Diocris.