Bulletin of the Bureau of Fisheries . ndition, which is theone more generally met with among tele-osts, resembles that described by Midlerfor Sander (Znicioperca), in which thepseudobranch receives blood from thehyoidean and hyoSpercular arteries. There appears to be considerablevariation among the teleosts with regard to the blood supply to the from the two methods described above for the tile-fish, the pseudobranch ofteleosts in general receives its blood (a) entirely from the circulus cephalicus ( to Maurer, 1888); (b) entirely by the hyoidean artery (Sphero
Bulletin of the Bureau of Fisheries . ndition, which is theone more generally met with among tele-osts, resembles that described by Midlerfor Sander (Znicioperca), in which thepseudobranch receives blood from thehyoidean and hyoSpercular arteries. There appears to be considerablevariation among the teleosts with regard to the blood supply to the from the two methods described above for the tile-fish, the pseudobranch ofteleosts in general receives its blood (a) entirely from the circulus cephalicus ( to Maurer, 1888); (b) entirely by the hyoidean artery (Spheroides, tig. 7):or (c) by all three vessels—i. e., the hyoidean artery, a branch of the a. hyooper-cularis, and the direct afferent pseudobranchial artery (Myoxocephalus, tig. 8). Inteleosts where the pseudobranch is wanting, the dorsal portion of the hyoidean arteryis reduced in size, as in Leptocephalus (tig. 2), where it terminates in branches whichsupply the branchiostegal region and membranes at the dorsal end of the Fig. 7.—Cranial portion of the arterial system in the swell-fisb [Spheroides maculatus). Ventral view, natural the right side the ventral ends of the efferent branchialarteries and their branches are reflected so as to bringthem into one plane. BLOOD-VASCULAR SYSTEM OK THE TILE-EISH. 95 The efferent pst uddbranchial vessel (fig. lf>. pi. i, and tigs. 1 and 6). The efferentpseudobranchial or ophthalmic artery (/£), arising from the caudal or exposed surfaceof the pseudobranch, leaves the latter at its ventromedial angle, and runs slightly
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectfisheries, bookyear19
