rqual I
also dissected, we find as follows:--

_R. giganteus._ _R. minor._

Cervical vertebrae 7 vertebrae 7
Dorsal 15 11
Lumbar, sacral, caudal 43 30
-- --
65 48

These differences must be specific.

At the extremity of the snout in either jaw there were 8 strong
bristles, being the only vestiges of hair found on the external surface.
The mouth was of great size; the tongue large and tolerably free, and of
a pale rose or vermilion colour. The baleen, where deepest, measured
about 4 inches; there were 370 plates on each side; but anteriorly and
posteriorly these plates were reduced to mere bristles.

The isthmus faucium allowed the closed hand to pass through it; through
this isthmus I do not believe that any water ever passes into the
pharynx, unless it be accidentally, as in man. The "spout" of the
Whalebone Whale is composed, no doubt, of the pulmonary vapour, and not
of any water received into the pharynx from the mouth.

The stomach seemed composed of five compartments externally, but
presented only four when laid open, the fifth being manifestly the
duodenum. In the intestines no remains of food were found, but abundance
of intestinal worms, and a substance strongly resembling the human
meconium. There was an ilio-caecal valve as distinct as in man. In the
rectum the folds of the mucous membrane were transverse.

_Organs of Respiration_.--The external nostrils were double; and the
cavities of the nostrils provided with the remarkable cartilages and
muscular apparatus I discovered and described in the anatomy of the
Great Rorqual. In this specimen they were about 4 inches in length, but
of as many feet in the large Rorqual. The mode of breathing in the
Rorquals does not differ much from that in man, with the exception of
the apparatus of the protruding cartilages, which in man are
rudimentary.

The _Olfactory Nerves_ were quite as large as in other mammals; and in
this respect the Balaena Whales are quite unlike the Dolphins[E].

The trachea communicated, near its upper part, with a sac or pouch; the
lungs were each composed of a single lobe. The rings of the trachea were
mostly deficient anteriorly. In the heart the foetal arrangements had
wholly disappeared. The dura mater seemed divisible into three layer