THE EVIDENCE OF THE AUDITORY APPARATUS AND THE ORGANS OF THE LATERAL LINE
Lateral line organs--Function of this group of organs--Poriferous
sense-organs on the appendages in Limulus--Branchial sense-organs--
Prosomatic sense-organs--Flabellum--Its structure and position--
Sense-organs of mandibles--Auditory organs of insects and arachnids--
Poriferous chordotonal organs--Balancers of Diptera--Resemblance to
organs of flabellum--Racquet-organs of Galeodes--Pectens of
scorpions--Large size of nerve to all these special sense-organs--
Origin of parachordals and auditory capsule--Reason why VIIth nerve
passes in and out of capsule--Evidence of Ammocoetes--Intrusion of
glandular mass round brain into auditory capsule--Intrusion of
generative and hepatic mass round brain into base of flabellum--
Summary 355