The given figures (A & B) shows the germinal layer. The animals having structures shown in the figures are respectively called 

Diploblastic animals have two germinal layers, outer ectoderm and inner endoderm, e.g., porifera and coelenterate. Triploblastic animals have three germinal layers – outer ectoderm, middle mesoderm and inner endoderm, e.g., platyhelminthes, aschelminthes, annelida, arthropoda, molluscs, echinodermata and chordata.