Snail ID? Nassarius?

I ran into these old pics from my pico. Can anyone get me an ID fron what they can see here?
 

 

 

 

 

http://www.fishtalpropagations.com/#!home/mainPage
"Making captive breeding easier."

No pics of the shell? It's going to be hard to ID them from those pics
 

Chad Penney - MBI Council
Agis quod Adis

Can't find any other pix from that tank. Those were taken in 2007. I'mm 99% sure I only bought nassarius snails though.

http://www.fishtalpropagations.com/#!home/mainPage
"Making captive breeding easier."

It's certainly a Nassarius Sp. The question is which one?
Without a shot of the shell it will really be almost impossible to be sure but if I was to guess I'd say Nassarius distortus. Which BTW is also my guess for the larger species that I have in my tank.
 

Chad Penney - MBI Council
Agis quod Adis

Looks like a nassarius egg pattern, too.

--Andy, the bucket man.
"Not to know the mandolin is to argue oneself unknown...." --Clara Lanza, 1886

distortus is possible, would need to see the aperture.  Given the tiny chained eggs it's definately a species with an extended pelagic period.  Could be occulata but the shell patterns from what I see just dont match.

Pelagically yours,
~J      

I don't know, Joe. My ceriths have really small eggs and lay in a fairly similar chain and their pelagic period has to be 24 hours or less as they tank-rear fairly well.

--Andy, the bucket man.
"Not to know the mandolin is to argue oneself unknown...." --Clara Lanza, 1886

True, but the ceriths also have a much smaller body mass.  Not to mention there arent too many reports of nassarius tank rearing aside from the RSF species.  I was basing my judgement off of egg size in comparison to the adult I probably should have made that one more clear.
 
You should try and document the pelagic period Andy, I know it's a pain but it's super good information!

Pelagically yours,
~J      

The ceriths get pretty big. Easily 2-3 times the size of the collumbellids and the collumbellid eggs are easily 2-3 times the size of the cerith eggs. The ceriths just start their meta at a much smaller size.
 

 
Well, I just don't have that many adults left, unfortunately. I still see them from time to time, but it's pretty rare. Unfortunately, I've seen the amphipods prey on the eggs and I suspect they prey on the newly settled juvies, too. The juveniles are _tiny._ I think I have a picture around that compares one to an amphipod. Easy pickins'.
 
The ceriths would be perfect for a dedicated rearing tank. Maybe in a room with a lot of light for algae.

--Andy, the bucket man.
"Not to know the mandolin is to argue oneself unknown...." --Clara Lanza, 1886