The annular phase of this solar eclipse can be observed in Lagos as a partial solar eclipse.Partial Solar Eclipses happen when the Moon comes between the Sun and the Earth, but they don't align in a perfectly straight line. Because of this, the Moon only partially covers the Sun's disc.
The Sun looks like the Moon has taken a bite out of it. This is because the Moon casts the lighter, outer part of its shadow, the penumbra, on Earth.
Eclipses are named after their max point. If an eclipse is total from any part on Earth, it will be called a total eclipse, even though it might be seen as a partial eclipse from most areas.
Both total and annular solar eclipses are seen as partial eclipses from the areas on Earth that are outside the Moon's umbra (inner shadow) but inside its penumbra (outer shadow)
Source: http://www.timeanddate.com/eclipse/in/nigeria/lagos?iso=20160901