The lowest layer in the epidermis is the stratum basal. The next layer is the stratum spinosum, followed by the stratum granolasum, followed by the stratum lucidum, followed by the stratum corneum. Now stratum simply is another word for layer. So we have five different layers found within the epidermis. Now the next question is where exactly are these four cells found within these five layers? So within the stratum basil, we have two types of cells.