This is not a civil record proper, but a "reconstitution" of civil records destroyed by fire during the Franco-Prussian war of 1870 or maybe the "Commune de Paris" the following year.
I found this link but am not at all an expert on the subject. See article bottom p. 306 - top 307
The addition of "Mixte" in a very different writing suggests it was added much later - maybe either Dreyfus period or WWII.
Just a couple of suggestions.
Nicole Heymans, near Brussels, Belgium