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Unformatted text preview: propelling itself backward with a kind of jet propulsion. By releasing the water and leaving air space, the tube could serve as a bouyancy device allowing the animal to rise and lower itself to different depths. These straight shelled nautiloids ranged in size from less than a centimeter to more than 14 feet long! All the living relatives of these nautiloids, squid, octopus, cuttlefish, and nautilus are predators, and we can assume that orthoceras was also a hunter of the Paleozoic seas, possibly having trilobites for breakfast! Notice the siphuncle and septa in the fossil below. The siphuncle is the line running down the center from head to tail. The septa are the short curved lines that run across or side to side....
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This note was uploaded on 11/22/2011 for the course GLY GLY1100 taught by Professor Jaymuza during the Spring '10 term at Broward College.
- Spring '10