count of element in XPath

...
<element>
    <e:Element1 xmlns:e="mynamespace" > ... </.. >
    <e:Element1 xmlns:e="mynamespace" > ... </.. >
    <e:Element1 xmlns:e="mynamespace" > ... </.. >
    <a/>
</element>
...

and this XPath:

//*[local-name()='element']/count(*) return 4 what is OK. but now I wanna know count of element1 what is 3. I try a lot of possibilities but with no succes. I have to use local-name and namespace-uri()