. Elementary entomology . Fig. 30. Section tlirough skin of a beetle {Chrysobothris) b, basement membrane ; c', primary cutic- ula ; C-, secondary cuticula ; //, hypoder- mis cell; ;?, nucleus, (.'\fter Tower, from Folsom)

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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912