Translation 2783

.... 212
North Pacific white-sided dolphins e.re found in the northern
part of the ï'acific Ocean,
from the Gulf of c.;alifôrnia. to the coast
of Alaska ^ 50o ïi) and the Aleutian Islands, and f rom Jc^. pan to tne.
Kurile Islands.
i•iour-&lass Dolphin
(I^^^enorizynohus cruci p-er Quoy and C2.ir!1fLrd, 1824)
The usual length of those dolphins is not more ti^all 2 metres.
-^`" ^ -. . ^. 1^. .,
P!1c. 72. 10:l:::^tï! t:oporttorrs.7om:i1
Ae:1Ly!Il:f,
6r.io6otalïk
Y`ig. 72. Hour-glass dolphin.. ^Translatox.'s A;ote: From discrepancies
betwecn the text and the illustrations, it is suspected
that either Pius. 72 and 73 have been interchassCed or that there has
been f:oP.le confusion in the descriptions.)
In external ap_pèarance tile.se dolphinu rosetable tne Atlantic
tirhi.te-.sided dolphin, L._ aclttusi*
The beak is not well deve:loped, and
is scarcely distinguishable from the head. The dorsL:.1. fin is large
(Fie;. 72). 'j'lle body colouring is peculiar.
The back is black from
the bea.k to the flukes. A black stripe runs irom the corners of the
eyes to tue bese of the flippers; continuirlE; a.lon- tue sides, it becomes
much wider below the dorsal fin, and almost runs into the .'black
colour of the back. Part of the sides, and t.1e belly, are white.
The biolot^y of thet:,e animals has oeen littlc: sil.uii ed.
In
winter they stay in the subtropical conveï'Cence zone.
uoviet whalers have often observed r;•roupû of these dolphins, 143
consisti.r.lg of some tens of tsu: animals, ii-, t'rl,7: waters of. tnc jLtlantic
sector of the Antarctic Ocean, even beyond 60 0 S.
])usl.y Dolphin (^^^ïeno^
ncllu;s ob:,curl:ta ,"ray, 1[32i3)
(syn, L. crucl.;Lr^
.I)usky dol•i)hislrs n.c•Lo,l.n e. lenf;tlt Of 210 cel.
li-he body o31aTSo is that typical of the ^rtlo.l.e ^',t31111;^, out the
()o;!]: 1.k: more, .C.^L';Irl^{ l'L].St].11(711. tllc`7.^)lt^ fl'Cllil :t:.iE'. 11CZ-.1CI. ; t!ll: C^Or.'i.La fin
is of inoi;.iu-,l :ai.sc., 'al !ü the colmcc!.vit-y lle!Is:is!ci t,.^: l:.csr..:-1 fin ir., r.!uch