Help with Costa Rican shell ID

[wolf]

Hi, parthicus!
At first glance, I have three suppositions:
CR shells 1: no. 7 might be <i>Tegula verrucosa</i> McLean, 1970 (family Trochidae).
CR shells 2: no. 3 is a little bit difficult to decide; might be Turbinidae, <i>Astraea buschii</i> (Philippi, 1844) or close to this species.
CR shells 3: no. 5 might be <i>Trivia radians</i> (Lamarck, 1811).
For the other specimens I need more time..... . I´m eager to know what the much better informed people say...... .
Kind regards: wolf <img src="images/smiley/smile.gif" alt="" border="0" />