These pages may not have enough words on them for Google to bother indexing them. For example, a page with photos but little text would be considered supplemental. Here is an example for you: http://www.tycatering.net/Entrees.htm
mmm, I don't know if the problem is with the body text and images... Look at the title and meta description, it is the same on all the pages..... Best regards, Jakomo
You could run you pages through tools that help check it for use of meta tags and other factors search engines us for their algo
The results not included in the main search results are supplemental results. You might have come across this message sometimes on the last search page while searching on Google. You can also check supplemental results of your site by entering in the syntax [ site:www.domain.com *** ] in Google search box.