wunder · LibraryCHAPTER IX.. Secondary Sexual Characters in the Lower Classes of the Animal
Read in the Wunder reader — freeSECONDARY SEXUAL CHARACTERS IN THE LOWER CLASSES OF THE ANIMAL KINGDOM.
These characters absent in the lowest classes--Brilliant colours--Mollusca--Annelids--Crustacea, secondary sexual characters strongly developed; dimorphism; colour; characters not acquired before maturity--Spiders, sexual colours of; stridulation by the males--Myriapoda 321-340
The Descent of Man and Selection in Relation to Sex, Vol. I · The Wunder Library — complete classics, free to read, with narration.
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