I'm going with Nina Hollander and Fred Griffin since I haven't a clue, although "crypt..." is a hint

I don't mind being off the wall or funny on most of these, but since Barbara Todaro is involved, I'd better google it...Okaaaaay, I wasn't too too far off...

It's a covered passageway... you'd see it in ancient Roman architecture.

It's a covered passageway, but I like Gabe Sanders' explanation better.  

I missed this lesson.

That is where they keep mummies

I have no idea!  It sounds ike a cross between a porpoise and a hippo with a mental condition.

I'm with Ryan Huggins - Thousand Oaks, CA on this one. 

Well, that sent me over to Google!  There is one on a monastery across town.

Tunnel or passageway between two crypts.

It's a passageway hidden by a cryptographic cipher that you need to break before gaining entry.  That's why this guy is on my team...

I've been through some tunnels like this.  

It's what you get 9 months after these two have a couple drinks and go back to her place.

It is excruciatingly painful!!

Possible passageway to doomsday.  

now you're a pain in my ass!!!! don't know this one!!

It's the door to the CryptKeeper.

I took a guess and then read the comments and wasn't far off. 

Hmm, that's a tongue twister

You have me coughing fom all the dust coming off my ancient terminology book! Need some air! Time to get out of the corridor!

Thank you.

Almost sounds like it should be on the SCI-FI channel!

A covered walkway.

Tony and Suzanne Marriott, Associate Brokers No idea!

I'll vote for Gabe Sanders' answer!

This had to be a Bond movie.

Don't you mean "WHO is Criptoporticus?"  Sandy calls me lots of names but so few know that one.  And no, I am not related to Skelitor!

Tunnel leading to one's crypt inside a vault. 

A hidden port.