Cloud Identification 

I'm really at a loss here. I have my Field Guide for North American Weather out, but I'm still not sure. What kind of cloud does this look like to you? 

http://img128.imageshack.us/img128/7718/cirrostratusnebulosus7va.jpg

I was thinking Cirrostratus nebulosus, it certainly resembles the picture they have, but it also resembles several other pictures.