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Sclater, P.L., on modified secondary wing-feathers in the males of Pipra; on elongated feathers in nightjars; on the species of Chasmorhynchus; on the plumage of Pelecanus onocrotalus; on the plantain-eaters; on the sexes and young of Tadorna variegata; on the colours of Lemur macaco; on the stripes in asses. Scolecida, absence of secondary sexual characters in.
Sympathy, among animals; its supposed basis. Sympathies, gradual widening of. Syngnathous fishes, abdominal pouch in male. Sypheotides auritus, acuminated primaries of the male; ear-tufts of. Tabanidae, habits of. Tadorna variegata, sexes and young of. Tadorna vulpanser. Tahitians, compression of the nose by the.
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