104
j
:—
THE 'BIOLOGY OF FISHES
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b0dy) by way of the hyoid arch (brokenline). This is the
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case in all Vertebrates and usually the mouth is placed in a
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arches
of
the
(quadraie
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omitted); '
pm,, pïemaxillary;
mx., maxillary;
p., _palatopterygoid;
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a:,orbit ;
hybma'ndibular ; pt., posttemporal ; *ssÿ, supraseapular;
,
,
,—
.ç,,plavicle ; am., abdominal muscle ; ha.,hyoclavicular connection; k., gill_—
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arches ;"h';, ceratohyal ; i., interoperculum; gh.,‘Qehiohyoid'mu‘scle to
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tip of lower jaw; a.,suspehsorium; smi,cheek—musdes ;{coçléé‘e
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,
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—
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î
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apparatus…“ But—the,compi‘essibrïQf’chè head lateràlly iii” the …
Teleosfs: has led to"th'e pointof the lôWer jaw being produced
foiwàrd,_ and this has been the origin of the diieulties.
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,
The pec'çoral arch
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5—
lis: represtd‘fhere ;.as
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h
«?“?:—, Î’L
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@ yfË=nfnntd :Wth the
kubutn the young .
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-Ïf,—ÎÊ£
as in all Higher
’”’ Vert-ch…… the arch
=f Îi«*ii;Q 26—SkullofProtopterus ‘Œfèm 9““e
free'
S°m_eümes
°
"lÔW‘èf the
lowermost
bone
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_‘jàw
,
,
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°»
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(ClaV1d—e) Qï.the seçqnd_
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tene f
1
;f
r (svprascapular)"gn‘1n‘sz
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“.
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-_
“direct conectibri'Wäit ,.
themdeof
”as” in the Ple'ctognaths and' theanc1ent fi
it- may be connected: bÿligamçm t'o_ï“.thé