Bulletin of the Bureau of Fisheries . ondition notlikely to be possessed by a teleost. Thewriter has found lateral hypobranchial ar-teries, as well as dorsal coronary arteries,in a number of teleosts in addition-to a kingfish (Menticirrh us) the ventral endsof the first, second, and third efferent bran-chial arteries were connected by a lateralhvpobranchial, while in a tomcoi~(Microga-dm, tig. 13) the ventral ends of all four ofthe efferent braneial arteries were third, fourth, and fifth pairs of com-missural arteries were also present in thisindividual. Th, fourth effere
Bulletin of the Bureau of Fisheries . ondition notlikely to be possessed by a teleost. Thewriter has found lateral hypobranchial ar-teries, as well as dorsal coronary arteries,in a number of teleosts in addition-to a kingfish (Menticirrh us) the ventral endsof the first, second, and third efferent bran-chial arteries were connected by a lateralhvpobranchial, while in a tomcoi~(Microga-dm, tig. 13) the ventral ends of all four ofthe efferent braneial arteries were third, fourth, and fifth pairs of com-missural arteries were also present in thisindividual. Th, fourth efferent branchial artery (;, pi. i, and fig. 12). This artery, which asa rule has no branches, joins the third efferentbranchial artery to form the second root of the dorsal aorta. A small artery (53)arises from the ventral surface of the second aortic root, and. running ventrad andlateral!, divides into branches which supply the sides of the pharynx, superiorpharyngeal teeth, and membranes on the rudimentary fifth branchial Fig. 13.—Ventral ends of the efferent branchial vessel:and their branches in the touieod. Ventral :i*p. riI THE DORSAL AORTA AND ITS BRANCHES. The dorsal aorta (fig. Hi, pi. I, and fig. 15) is formed by the junction of the twopairs of aortic roots, and extends caudad along the ventral surface of the vertebralcolumn in a series of undulations which correspond to the topography of the ventral BIOOD-VASCTLAR SYSTEM OF THE TILE-FISH. 103 surface of the vertebral column. That portion of the dorsal aorta which runs in theabdominal region lies free, while that in the tail is inclosed by the haemal arches. Tin ccdiacomesenteric artery. The coeliacomesenteric artery (54) is not, strictlyspeaking-, a branch of the dorsal aorta,as it arises in common with the latter and thesecond right aortic root. It is an artery of considerable size, running caudad anddividing into numerous branches. The first branch (55) arises about 1 cm. from the origin of the artery,
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectfisheries, bookyear19
