Ten parades are scheduled to roll Saturday in four parishes, in addition to the alternative parades of ’tit Rex and Chewbacchus, both of which have grown in size and swagger.

On the West Bank, the 17th annual parade of the Mystic Knights of Adonis rolls with more than 40 units traveling through Orleans and Jefferson parishes. The theme of the 14-float procession is “Adonis: Short and Sweet,” and it features 200 men and women maskers.

St. Bernard Parish’s only parade, the Knights of Nemesis, rides for the 10th time. The parade does not have a theme but features 19 Blaine Kern floats and more than 300 riders. Logo items include footballs, cups, foam sports balls and T-shirts, which are sponsored by local businesses.

From 1 p.m. until well after dark, five parades will roll along St. Charles Avenue on Saturday, starting with the Krewe of Pontchartrain’s 40th edition. The theme of the 15-float parade is “Go Jump in the Lake.” Paradegoers must fill in the blanks on each float sign, which poses questions about landmarks on Lake Pontchartrain. The parade includes a band contest.

Choctaw’s move in 2013 from the West Bank to the Uptown route has resulted in a growing membership that now totals 363 men, women and children. The “Through the Years” theme reflects the club’s 80th anniversary. Choctaw collectible throws include hats, plush spears and handcrafted wooden tomahawks — which are handed out, not thrown.

The new Krewe of Freret, which borrows its name from a successful club of the past, debuted in last year’s Carnival and rolls again Uptown with the theme “Sophomore Shenanigans.” The 14-float parade will feature custom-made masks and other locally produced throws. The inscription on its doubloons — WCBS — stands for “We Can’t Be Stopped.”

The 300 Knights of Sparta plan a 17-float parade with the musical theme “In the Mood.” The captain, his shadow and an honor guard of officers will be on horseback. The parade also features traditional flambeaux, a mule-drawn king’s float and a Spartan Helmet signature float, which also is mule-drawn. Krewe-emblemed throws include the Spartan Mystery Throw.

Pygmalion follows Sparta and presents a 20-float procession. “The Spectrum of Emotions” is this year’s theme. This will be the club’s 16th annual parade; the procession traditionally features more than 80 units. The 388 male and female members will toss plush jester dolls, lighted Pygmalion figurines and doubloons in several colors.

The 550-member Krewe of Caesar, the largest Carnival organization in the history of Jefferson Parish, presents a 25-float procession titled “Broadway on Parade” for its 36th annual parade. Caesar will showcase its famous signature float, the three-headed, fiber optic Hydra tandem. Kid-friendly celebrity grand marshals include Iron Man and Spiderman, who will toss more than 1,500 hologram collectors cards to the crowd. Caesar’s costumes are second to none.

There are two parades in St. Tammany Parish on Saturday. Celebrating its 50th anniversary in 2014, the Mystic Krewe of Olympia parades in Covington with 300 members on 20 floats. The Budweiser Clydesdales will make a special appearance in the parade, which also includes a “Wounded Warrior” float. Members will throw lighted crest beads, lighted lightning rods and anniversary doubloons.

The Mystic Krewe of Titans rolls for the fifth time in Slidell with a procession titled “The Titans Horror Story.” The club’s 140 men ride 10 floats and will throw lighted fleur-de-lis medallions and T-shirts.