Is there any way to find immigration records from about 1855-1842 from GUINEA to PUERTO RICO?

Specifically I am looking in that date because the 1910 Census has Mauricio SALAS y SALIA being born abt 1842 in Puerto Rico, but it has his parents listed as being born in GUINEA.

Specifically it has GUINEA "Left" (I think that is what it says anyway. The hand-writting is questionable). Is this the GUINEA in Cuba?

Any help (even if its just background information and not person-specific) would be very much appreciated. Thanks.