cochin harbour terminus is a railway station on cochin island. it is not used anymore for express train services. ernakulam jn and ernakulam town (both on mainland) are now the stations used.
For those who do not know the geography of this place.........ernakulam is the city on mainland and has railway stations ernakulam jn and ernakulam town. just across a narrow channel lies the island of cochin (now known as kochi) and cochin has a railway connection and a railway station called cochin harbour terminus......this station was used previously but now not used anymore......trains which earlier used to run to cochin ht are now terminated at ernakulam jn railway station.