No, you are putting an anti-Communist interpretation on the cartoon. There are other ways of looking at it. For example, "The shell represents pre-Communist social and economic structures and ways of thinking. Like the shell, these structures once played a vital role in helping the human species to survive, but now their time has come to give way to the proletariat they have enclosed/held down. The embryo of the Communist worker has now developed to the point where he must overcome and break these structures so that he can bravely face the world for the good of the species. At this time, he alone understands what is truly best; the shell does not understand, but clings ignorantly to what is familiar." At least that's what I might have told the censors if I had been the cartoonist.

The shell is the metaphor for reform of the communist ideology and breaking away from it

Either that or maybe some therizinosaurs or titanosaurs anthropomorphized with hands.