[A37]

Flower June 27 / 71 Origin

Whales bellow. Kangaroos silent Flower suggests projection of larynx might be very inconvenient for swallowing grass — with cetacea he thinks, judging from structures that it is not improbable that the [larynx] is drawn downwards in the act of swallowing. —

Whalebone only 9 or 10 inches long in Balænoptera rostrata — — Bottle-nosed whale (Hyperodon bidens) no functional teeth, but small horny projections have been seen on palate — see Owen Odontography.

See Eschricht Roy Soc. on fœtal whalebone.—

Fl. did not seem to object much to Duck as far as function is concerned — Whalebone does not replace teeth, though homologous with it —

Thinks Turners view correct.—

[A37v]

Balænopt Head 1/4 of length — say

28. ft— 1/4 = 7 feet. [×] 12 [=] 84 inches long

Duc Shoulder become base 5 inches.

[calculations not transcribed] (Hyperodon Head — Bet Palate)

Say Shoulder bone about 1/18 of length of Balaenop

Lamell. 33 in length ie 1/3 of inch = [3 words illeg]