Translation 2783

191
between its tips being up to 15 cm. The dorsal fin lies at the
beginning of the posterior third of 'Lie body, and varies in shape. -
The flipPers are small, and are shaped something. like an elongated,
concavo-convex triangle. .The flukes are separated by an inconspicuous
notch. -Their spread is from one-quarter to one-third of tae body -
length.
The body colour.varies greatly. Post commonly one observes
grey or bluish-grey opecimens, or they may be bluish-black above while
the sides and belly are much lighter in colour (tney may. even be white);
sometimes there are rows of spots on the sides and back.
There are from 46 to 49 vertebrae (seven cervical, nine or ten .
thoracic, ten or eleven lumbar, and from 19 to 22 caudal).
Goose-beaked whales are distributed through all the oceans
and almost all seas except inland seas. In Soviet territory, stranded
.individuals are often found on the ṇ.omandorskie Islands. ..uheir distribution
in high latitudes has not been adequately investigated.
Genus 3erardius Duvernoyi 1851 (Giant Bottle-nosed Whales)
The small head of members of this genus occupies from.oneeighth
to one-seventh of the body length. The lower 'jaw is longer
than thé upper.one. At its extreme .tip tnere is a pair of large teeth
up to 9 cm long; a second pair semetimes does not cut through .the .
gums, and is often absent in females. The flippers are long and
tapered. The low dorsal fin is located above the anaà orifice.
This genus contains two species, one living in the northern
and the other in the southern hemisphere. Only one of them -- the
northern species -- is of economic im -nortance.
Northern Pacific Giant Lottle-nosed Whale
(Berardius bairdi 8tejneger, 1663)
This is the largest of the toothed whales, except for sperm
whales; the females attain a length of 12.2-12.5 métres, and the males
11.5 metre's. Acco.rdinc to japanese data, the females are :50 cra lofieer
thah the males.
'the spindle-shaped body bas ito greatest Girta behind tue
flippers, after which the booy gradually tapers off; the caudal section
is compressed laterally (.1.g. 52).
..he head is small, and occiipies abuut ontuhLti of the body
lonujth.. onout projecte rurwto:d ( . 01) lu 00 c1.1) and Lu r3omuwhat