Which kind of sushi did you get? If its the cylindrical pieces of rice with seafood and other vegetables wrapped in Nori (Edible japanese seeweed), its called Norimaki.
There are several types of sushi, but I cant remember them all so Ill just source from wikipedia
Chirashizushi - A bowl of sushi rice topped with sushi ingredients
Inarizushi - Dumping pouch made of fried tofu normally containing sushi rice
Makizushi (Norimaki) - Most likely the kind you got
Futomaki - Similar to Norimaki, but fatter (IE around 2 inches wide(
Hosomaki - Similar to Norimaki but with Nori on the outside and normally containing only 1-2 fillings
Temaki - Think of a ice cream cone (Completely coneshaped) made of Nori and filled with rice and filling
Uramaki - Similar to Norimaki but a bit larger, but not as large as Futomaki
Narizushi - Gutted fish are stuffed and covered in salt, and then placed in a barrel and then lathered again with salt then pressed down with a special stone made for this purpose. Days pass and the water then seeps out. After about 6 months, the fish is then made into any kind of sushi and then ready to eat.
Nigirizushi - This is the most popular form of sushi right after Norizushi. Its a rectangular piece of rice which then has a bit of wasabi on the top. A topping consisting of a single type of fish like salmon, tuna, squid, ect is pressed ontorp of the rice with the wasabi acting as a sort of improvised glue.
Gunkanmaki - Subtype of Nigirizushi in which it is produced like Nigiri, but instead is wrapped in nori to make it look similar to a battleship.
Temarizushi - A hand pressed piece of sushi which in the end looks like a ball.
Oshizushi - think of a cracker. Oshizushi is just like that. Toppings are added to the bottom, then covered in rice and toppings, and then pressed together in a special box called a oshibako to make a delicious square piece of sushi.
Then the last kind of sushi is Western Style. I cant really find any difference between Norimaki and Western style except that in western style Rice is on the outside, then nori, then the fillings.
Anyway I hope this helps
Sushi forget yeah :D