圓口綱脊椎動物

圆 = 员 + 囗 : Yu the Great (yu) is having dinner in the anthill's kitchen (an2). There is a waiter (员) serving her food from a wooden box (囗) until Yu the Great is as round (圆) as the full moon.

Mnemonic symbol: 口 shall be represented by a mandarin. Karl Marx (k-) is enjoying a mandarin in the outhouse's living room (ou3).

纲 = 冈 + 纟 : Guy Fawkes (g) wants to become a fisher of men, so he sets up a net in front of the anglepod (ang1) between two ridges (冈). The silk worm (纟) helps him by spanning the head rope of the fishing net (纲) between the two ridges.

脊 = 兆 + 月 : Joan of Arc (ji) collapsed on the ridge (脊) of the moon during her hike in the space station's living room (Ø3). A vulture (兆) is waiting nearby for Joan to die so it can rip out her spine (脊).

椎 = 木 + 隹 : The sparrow (隹) put a very special present for Julian Giant Squid (zhu) under the Christmas tree (木) in front of the Eiffel Tower (ei1): a spine (椎).

动 = 云 + 力 : Doggy Dog notices a lot of smoke when he enters engine's bathroom. Instead of thinking long, he acts quickly and moves to push the fire alarm button.

物 = 勿 + 牛 : Willy Walrus (w) wants to become a physicist (物) and does research about dark matter (物) in the space station's bathroom (Ø4). His motivation is to become a super villain and rule the world. Just as he is about to have a breakthrough, a huge black ox (牛) flying with the help of bat wings (勿) hits Willy with an oxerang and takes away the dark matter, saving the world.