Hi Blazin' -
Do you have pictures of the whole plant? Where did these leaves come from (what part of the plant)? How much of the rest of the plant is efffected? It might help to have a picture of the plant, too, to give it more context. Maybe a little more info about the soil and nutrients you are using, too. (Sorry if it's mentioned elsewhere). Another thought is to post your issue in the problem solving section:
Problems, Pests & Disease Control
I'll be honest, I've never had leaves that looked quite like that, so I'm not your best bet to answer what specific deficiency that is - nor do I grow in soil. I'm sure it's obvious to someone, just haven't stumbled into that one yet I guess. However, I'm always game to try and help if I can - and in some ways, it doesn't matter WHAT the deficiency is, as the fix is usually the same regardless.
First, since you are having some issues, I'd recommend a good flush if you haven't done one lately. Either straight water or a 25% nutrient strength. There is some theory that a light nutrient solution like 25% actually flushes better than plain water, but I'm sure either would work. Again, I don't grow in soil, but I believe they recommend 2-3 times the volume of the pot be poored through the soil to clean out any excess nutrient salts. Basically what you are doing, is "resetting" and cleaning out built up nutrients in the soil. It's good to periodically flush water through your soil to clear out salts. In my coco coir plants, I also water with about 10% run off each time. I believe this is good practice for soil, too, but you might want to verify that (and everything I'm suggesting) with a soil grower.
Second, since you are having some issues, it might not be a bad idea to have/buy a good PH meter. Just to ensure that you are giving them a mix they can digest properly. Alternatively, flush periodically, don't over fertilize, and use a good soil mix.
Sorry I can't be of more assistance, but I am sending you mucho positive vibes regardless!!