_**Sea adventure in Jamaica with Ryan and Quinn**_ Two American divers (Robert Ryan and Anthony Quinn) get a gig in Jamaica to find a sunken vessel with gold cargo while carousing and seeking out fair ladies (Mala Powers and Suzan Ball). Unfortunately, there are shady characters afoot (George Mathews). Woody Strode has a peripheral role. "City Beneath the Sea" (1953) is an oceanic adventure/thriller that has the look and tone of “Dinosaurus!” (1960), but is thematically similar to "The Deep" (1977), "Into the Blue" (2005), "Into the Blue 2: The Reef" (2009) and "Fool's Gold" (2008). The best…