For the publication dates of the parts see Sherborn (1937)
Sherborn C.D. 1937. ON THE DATES OF PUBLICATION OF COSTA (O. G.) AND (A.) FAUNA DEL REGNO DI NAPOLI, 1829-1886. Journal of the Society for the Bibliography of Natural History 1(2): 35-47. DOI: jsbnh.1937.1.2.35
see
http://www.biodiversitylibrary.org/item/129902#page/14/mode/1up
For a digitalised version of the whole set see:
http://gdz.sub.uni-goettingen.de/index.php?id=15&PID=PPN62065239X&L=0
and
http://gdz.sub.uni-goettingen.de/index.php?id=15&PID=PPN620696850&L=1
plates see: https://www.biodiversitylibrary.org/page/55221828